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.....資料........資料...解一元一次方程專項(xiàng)練習(xí)247題(有答案)1..=﹣2;3.﹣2=.4.5..6.x﹣=2﹣.7.8..9.10.11.﹣6x=﹣x+1;12.y﹣(y﹣1)=(y﹣1);13.[(x﹣)﹣8]=x+1;.15.﹣=1.16.17.2﹣=﹣.18.﹣1=﹣.19..20..21.22..23.;24..25..26.27..28.2﹣=x﹣;29.﹣1=.30..31.(x﹣1)=2﹣(x+2).32..33.34.35.;36..37..38.39.40.41.42.x﹣43.;44..45.(x﹣1)﹣(3x+2)=﹣(x﹣1).46.;47.;48..49.+1=;50.75%(x﹣1)﹣25%(x﹣4)=25%(x+6)51.52.53.54.55.56.57.;58..59.2x﹣(x﹣3)=[x﹣(3x+1)].60.61.62.x+=1﹣63..64.65.﹣=.66.=67.68.69.70.=;71.3(x+2)﹣2(x﹣)=5﹣4x.72.2x﹣73.74.[(﹣1)﹣2]﹣x=2.75.﹣1=.76.,77..78.79.80.;81..82.83.84.85.﹣=.86.=1﹣.87.88..89..90..91.92.;93..94..;96..97..98.;99.[(x﹣1)﹣3]=2x﹣5;100..101.70%x+(30﹣x)×55%=30×65%.102.﹣=﹣x103.104.105.;107.﹣=1.5.108.﹣9.5109.110.111.112.﹣=1;113.[(2x+2)﹣x]=.114.115.116.117.z+=z﹣;118.;119..120..121.122.;123.(5x﹣2)×30%=(7x+8)×20%.124..125.;126.;127.;128..129.130.2{3[4(5x﹣1)﹣8]﹣20}﹣7=1;=1;132.x﹣2[x﹣3(x+4)﹣5]=3{2x﹣[x﹣8(x﹣4)]}﹣2;133.;134..135.136.137.{}=1138.139.﹣[x﹣(x﹣)]﹣=x+.140..141.=3.142.x﹣=2﹣;143.﹣=.145..146..147..148..149..150..151.x﹣[x﹣(x﹣9)]=(x﹣9)152..153..154..155.156..157..158..159..160..161..162..163.164..165..166.167..168..169.;170..171...172..=+2.173..174.﹣=1﹣.175..176..177..178.﹣=16.179..180.=(x﹣1)﹣181.=0.182..183..184.z+=z﹣.185..186.187..188.189.﹣=3190..191.;192..193.+=1﹣x.194..195.196.﹣1197.198.199..200.4x+3(0.2﹣2x)=(8﹣6x)﹣2x;201..202..203.﹣.204.y﹣=3﹣205.+x=.206..207..208.(x﹣2)+2x=(7﹣5x);209.0.7x+0.5(30﹣x)=30×0.6.210.﹣=5.211.212.213..214..215.3x+.216..217.218.﹣=1﹣219.﹣=.220.;221..222.﹣=1223.224..225.﹣(1﹣2x)=(3x+1)226.﹣=﹣x227..228.+=+1229..230..231.2[1﹣(x﹣)]=3[﹣(2x﹣)].232.{[(x+5)﹣4]+3}=1233..234.,235..237..238..239..240.﹣=3﹣.241.242..243.244..245..247..

解一元一次方程247題參考答案:1.去分母得:3(2﹣x)﹣18=2x﹣(2x+3),去括號(hào)得:6﹣3x﹣18=﹣3,移項(xiàng)合并得:﹣3x=9,∴x=﹣32.去分母得,3(x﹣1)=4(2x﹣1)﹣24,去括號(hào)得,3x﹣3=8x﹣4﹣24,移項(xiàng)、合并同類項(xiàng)得,5x=25,系數(shù)化為1得,x=5;3.原方程變形為:﹣2=,去分母得,4(2x﹣1)﹣24=3(10x﹣10),去括號(hào)得,8x﹣4﹣24=30x﹣30,移項(xiàng)、合并同類項(xiàng)得,22x=2,系數(shù)化為1得,x=4.去分母得,7(1.7﹣2x)=3x﹣2.1去括號(hào),11.9﹣14x=3x﹣2.1移項(xiàng)合并同類項(xiàng)得,﹣17x=﹣14系數(shù)化為1得,x=.5.原方程變形成5(3x+1)﹣20=3x﹣2﹣2(2x+3)15x﹣15=﹣x﹣816x=7∴6.去分母得:6x﹣3(x﹣1)=12﹣2(x+2)去括號(hào)得:6x﹣3x+3=12﹣2x﹣4移項(xiàng)得:6x﹣3x+2x=12﹣4﹣3合并得:5x=5系數(shù)化為1得:x=1.7.去分母得:5(4﹣x)=3(x﹣3)﹣15,化簡(jiǎn)可得:2x=11,系數(shù)化1得:x=8.原式可變形為:3(3y﹣1)﹣12=2(5y﹣7)去括號(hào)得:9y﹣3﹣12=10y﹣14移項(xiàng)得:9y﹣10y=﹣14+12+3合并得:﹣y=1系數(shù)化1得:y=﹣19.原方程分母化整得:去分母,得5(x+4)﹣2(x﹣3)=1.6,去括號(hào),得5x+20﹣2x+6=1.6,移項(xiàng)、合并同類項(xiàng),得15x=﹣122,系數(shù)化1,得x=10.去分母得:4(x+1)=5(x+1)﹣6,去括號(hào)得:4x+4=5x+5﹣6,移項(xiàng)、合并得:﹣x=﹣5,系數(shù)化為1得:x=5.11.移項(xiàng),合并得x=,化系數(shù)為1,得x=;12.去分母,得6y﹣3(y﹣1)=4(y﹣1),去括號(hào),得6y﹣3y+3=4y﹣4,移項(xiàng),合并得y=7;13.去括號(hào),得(x﹣)﹣6=x+1,x﹣﹣6=x+1,移項(xiàng),合并得x=;14.原方程變形為﹣1=,去分母,得2(2﹣10x)﹣6=3(1+10x),去括號(hào),得4﹣20x﹣6=3+30x,移項(xiàng),合并得﹣50x=5,化系數(shù)為1,得x=﹣.15.去分母得:3(x﹣7)+4(5x﹣6)=12,去括號(hào)得:3x﹣21+20x﹣24=12,移項(xiàng)得:3x+6x=12+21+24,合并同類項(xiàng)得:9x=57,化系數(shù)為1得:x=16.去分母:6(x﹣3)+4(6﹣x)=12+3(1+2x),去括號(hào):6x﹣18+24﹣4x=12+3+6x,移項(xiàng):6x﹣4x﹣6x=12+3+18﹣24,化簡(jiǎn):﹣4x=9,化系數(shù)為1:x=﹣.17.去分母得:12﹣2(2x﹣4)=﹣(x﹣7),去括號(hào)得:12﹣4x+8=﹣x+7,移項(xiàng)得:﹣4x+x=7﹣20,合并得:﹣3x=﹣13,系數(shù)化為1得:x=.18.去分母得:3(2x+1)﹣12=4(2x﹣1)﹣(10x+1),去括號(hào)得:6x+3﹣12=8x﹣4﹣10x﹣1,移項(xiàng)合并同類項(xiàng)得:8x=4,系數(shù)化為得:x=19.去分母得:2(5x﹣7)+12=3(3x﹣1)去括號(hào)得:10x﹣14+12=9x﹣3移項(xiàng)得:10x﹣9x=﹣3+14﹣12系數(shù)化為1得:x=﹣120.去分母得:3(3x+4)﹣2(6x﹣1)=6去括號(hào)得:9x+12﹣12x+2=6移項(xiàng)、合并同類項(xiàng)得:﹣3x=﹣8系數(shù)化為1得:x=21.去分母得:6(x+4)﹣30x+150=10(x+3)﹣15(x﹣2)去括號(hào)得:6x+24﹣30x+150=10x+30﹣15x+30移項(xiàng)、合并得:﹣19x=﹣114化系數(shù)為1得:x=6.22.去分母得:4(2x﹣1)﹣3(3x﹣1)=24,去括號(hào)得:8x﹣4﹣9x+3=24,移項(xiàng)合并得:﹣x=25,化系數(shù)為1得:x=﹣2523.原方程可以變形為:5x﹣10﹣2(x+1)=3,5x﹣10﹣2x﹣2=3,3x=15,x=5;24.原方程可以變形為[x﹣(x﹣x+)﹣]=x+,(x﹣x+x﹣﹣)=x+,(x﹣)=x+,,,x=﹣25.﹣=﹣12(2x﹣1)﹣(5﹣x)=3(x+3)﹣62x=10x=526.去括號(hào)得:x﹣﹣8=x,移項(xiàng)、合并同類項(xiàng)得:﹣x=8,系數(shù)化為1得:x=﹣8.27.,去分母得:2x﹣(3x+1)=6﹣3(x﹣1),去括號(hào)得:2x﹣3x﹣1=6﹣3x+3,移項(xiàng)、合并同類項(xiàng)得:2x=10,系數(shù)化為1得:x=528.12﹣(x+5)=6x﹣2(x﹣1)12﹣x﹣5=6x﹣2x+2﹣x﹣6x+2x=2﹣12+5﹣5x=﹣5x=1;29.4(10﹣20x)﹣12=3(7﹣10x)40﹣80x﹣12=21﹣30x﹣80x+30x=21﹣40+12﹣50x=﹣7.30.去分母得:3(2x+1)﹣12=12x﹣(10x+1),去括號(hào)得:6x﹣9=2x﹣1,合并得:4x=8,化系數(shù)為1得:x=2.31.去分母得:5(x﹣1)=20﹣2(x+2),去括號(hào)得:5x﹣5=20﹣2x﹣4,移項(xiàng)合并得:7x=21,系數(shù)化為1得:x=3.32.原方程可化為:去分母得:40x+60=5(18﹣18x)﹣3(15﹣30x),去括號(hào)得:40x+60=90﹣90x﹣45+90x,移項(xiàng)、合并得:40x=﹣15,系數(shù)化為1得:x=33.原方程變形為:50(0.1x﹣0.2)﹣2(x+1)=3,5x﹣10﹣2x﹣2=3,3x=15,x=5.34.去分母得:2(2x﹣1)=6﹣3x,去括號(hào)得:4x﹣2=6﹣3x,移項(xiàng)得:4x+3x=8,系數(shù)化為1得:x=35.方程兩邊同乘15,得3(x﹣3)﹣5(x﹣4)=15,整理,得3x﹣9﹣5x+20=15,解得﹣2x=4,x=﹣2.36.方程兩邊同乘1,得50(0.1x﹣0.2)﹣2(x+1)=3,整理,得5x﹣10﹣2x﹣2=3,解得:3x=15,∴x=537.去分母得:3y﹣18=﹣5+2(1﹣y),去括號(hào)得:3y﹣18=﹣5+2﹣2y,移項(xiàng)合并得:5y=15,系數(shù)化為1得:y=3.38..解:去括號(hào)得:12﹣2y﹣2﹣3y=2,移項(xiàng)得:﹣2y﹣3y=2﹣12+2,合并同類項(xiàng)得:﹣5y=﹣8,系數(shù)化為1得:.39.解:去分母得:3(2﹣x)﹣18=2x﹣(2x+3),去括號(hào)得:6﹣3x﹣18=2x﹣2x﹣3,移項(xiàng)得:﹣3x﹣2x+2x=﹣3﹣6+18(或﹣3x=﹣3﹣6+18),合并同類項(xiàng)得:﹣3x=9,系數(shù)化為1得:x=﹣3去分母得:3x(x﹣1)﹣2(x+1)(x+6)﹣(x+1)(x﹣1)=6去括號(hào)得:3x2﹣3x﹣2x2﹣14x﹣12﹣x2+1=6合并得:﹣17x=17化系數(shù)為1得:x=﹣141.原式通分得:,整理得:,將其變形得:﹣x+3=6,∴x=﹣3.42.原式變形為:x+3=,將其通分并整理得:10x﹣25+3x﹣6=15x+45,即﹣2x=76,∴x=﹣3843.解:去分母得,3(x﹣7)﹣4(5x+8)=12,去括號(hào)得,3x﹣21﹣20x﹣32=12,移項(xiàng)合并同類項(xiàng)得,﹣17x=65,系數(shù)化為1得,x=;44.解:去括號(hào)得,2x﹣x+x﹣=x﹣,去分母得,24x﹣6x+3x﹣3=8x﹣8,移項(xiàng)合并同類項(xiàng)得,13x=﹣5,系數(shù)化為1得,x=﹣45.去分母得:15(x﹣1)﹣8(3x+2)=2﹣30(x﹣1),∴21x=63,∴x=346.去括號(hào),得a﹣﹣2﹣a=2,去分母,得a﹣4﹣6﹣3a=6,移項(xiàng),合并得﹣2a=16,化系數(shù)為1,得a=﹣8;47.去分母,得5(x﹣3)﹣2(4x+1)=10,去括號(hào),得5x﹣15﹣8x﹣2=10,移項(xiàng)、合并得﹣3x=27,化系數(shù)為1,得x=﹣9;48.把分母化為整數(shù),得﹣=2,去分母,得5(10x+40)﹣2(10x﹣30)=20,去括號(hào),得50x+200﹣20x+60=20,移項(xiàng)、合并得30x=﹣240,化系數(shù)為1,得x=﹣849.+1=解:去分母,得3x+6=2(2﹣x);去括號(hào),得3x+6=4﹣2x移項(xiàng),得3x+2x=4﹣6合并同類項(xiàng),得5x=﹣2系數(shù)化成1,得x=﹣;50.75%(x﹣1)﹣25%(x﹣4)=25%(x+6)解:將原方程等價(jià)為:0.75(x﹣1)﹣0.25(x﹣4)=0.25(x+6)去括號(hào),得0.75x﹣0.75﹣0.25x+1=0.25x+1.5移項(xiàng),得0.75x﹣0.25x﹣0.25x=1.5﹣1+0.75合并同類項(xiàng),得0.25x=1.25系數(shù)化成1,得x=551.去分母得:5(x﹣3)﹣2(4x+1)=10,去括號(hào)得:5x﹣15﹣8x﹣2=10,移項(xiàng)、合并得:﹣3x=27,系數(shù)化為1得:x=﹣9.52.去括號(hào)得:2x﹣4﹣x+2=4,移項(xiàng)、合并得:x=6.53.去分母得:12x﹣(2x+1)=12﹣3(3x﹣2),去括號(hào)得:12x﹣2x﹣1=12﹣9x+6,移項(xiàng)、合并得:19x=19,系數(shù)化為1得:x=154.去括號(hào)得:x﹣1﹣3﹣x=2,移項(xiàng),合并同類項(xiàng)得:﹣x=6,系數(shù)化為1得:x=﹣8.55去分母得:18x+3(x﹣1)=18﹣2(2x﹣1),去括號(hào)得:18x+3x﹣3=18﹣4x+2,移項(xiàng),合并得:25x=23,系數(shù)化為1得:x=.56.去分母得:3x﹣7﹣2(5x+8)=4,去括號(hào)得:3x﹣7﹣10x﹣16=4,移項(xiàng)、合并得:﹣7x=27,系數(shù)化為1得:x=﹣.57.去分母得:3(3x+5)=2(2x﹣1),去括號(hào)得:9x+15=4x﹣2,移項(xiàng)合并得:5x=﹣17,系數(shù)化為1得:;58.去分母得:(5x+2)﹣2(x﹣3)=2,去括號(hào)得:5x﹣2x=﹣6+2﹣2,移項(xiàng)合并得:3x=﹣6,系數(shù)化為1得:x=﹣259.去小括號(hào)得:2x﹣x+2=[x﹣x﹣],去中括號(hào)得:2x﹣x+2=x﹣x﹣,去分母得:12x﹣4x+12=2x﹣3x﹣1,移項(xiàng)、合并得:9x=﹣13,系數(shù)化為1得:x=﹣60.,去分母得3(x﹣15)=﹣15﹣5(x+7),∴3x﹣45=﹣15﹣5x﹣35,∴x=;61.,方程變形為,去分母得20x﹣20x+30=﹣2x+6,∴x=﹣1262.去分母得:15x+5(x+2)=15﹣3(x﹣6)去括號(hào)得:15x+5x+10=15﹣3x+18移項(xiàng)得:15x+5x+3x=15+18﹣10合并得:23x=23系數(shù)化為1得:x=163.原方程可化為:﹣=,去分母得:4x+8﹣2(3x+4)=2(x﹣1),去括號(hào)得:4x+8﹣6x﹣8=2x﹣2,移項(xiàng)合并同類項(xiàng)得:﹣4x=﹣2,系數(shù)化為1得:x=64.原方程可化為:,去分母得:3(7x﹣1)=4(1﹣2x)﹣6(5x+1)去括號(hào)得:21x﹣3=4﹣8x﹣30x﹣6移項(xiàng)合并同類項(xiàng)得:59x=1系數(shù)化為1得:x=65.去分母得:4(3x﹣2)﹣6=7x﹣4.去括號(hào)得:12x﹣8﹣6=7x﹣4.移項(xiàng)、合并同類項(xiàng)得:5x=10.系數(shù)化為1得:x=2.66.原方程可以化為:=+1去分母得:2(2x﹣1)=3(x+2)+6去括號(hào)得:4x﹣2=3x+6+6即x=1467去分母得:4(2x﹣1)﹣3(2x﹣3)=12,整理得:2x﹣7=0,解得:x=3.5.68.去括號(hào),,∴,∴x+1=2,解得:x=169.去分母得:6(4x+9)﹣15(x﹣5)=30+20x去括號(hào)得:24x+54﹣15x+75=30+20x移項(xiàng),合并同類項(xiàng)得:﹣11x=﹣99化系數(shù)為1得:x=970.去分母得:7(5﹣7x)=8(5x﹣2),去括號(hào)得:35﹣49x=40x﹣16,移項(xiàng)合并同類項(xiàng)得,﹣89x=﹣51,系數(shù)化為得:x=;71.去括號(hào)得:3x+6﹣2x+3=5﹣4x,移項(xiàng)合并同類項(xiàng)得:5x=﹣4,系數(shù)化為得:x=﹣.72..去分母得:12x﹣2(5x﹣2)=24﹣3(3x+1),去括號(hào)得:12x﹣10x+4=24﹣9x﹣3,移項(xiàng)、合并得:11x=17,系數(shù)化為1得:x=.73.去分母得:6x﹣2(1﹣x)=(x+2)﹣6,去括號(hào)得:6x﹣2+2x=x+2﹣6,移項(xiàng)得:6x+2x﹣x=2﹣6+2,合并同類項(xiàng)得:7x=﹣2,系數(shù)化為得:x=74.去中括號(hào)得:(﹣1)﹣3﹣x=2,去括號(hào)、移項(xiàng)、合并得:﹣x=6,系數(shù)化為1得:x=﹣875.去分母得:(2x+5)﹣24=3(3x﹣2),去括號(hào)得:8x+20﹣24=9x﹣6,移項(xiàng)得:8x﹣9x=﹣6﹣20+24,合并同類項(xiàng)得:﹣x=﹣2,系數(shù)化為1得:x=2.76.去括號(hào)得:x+++=1去分母得:x+1+6+56=64移項(xiàng)得:x=177.去分母得:3﹣(x﹣7)=12(x﹣10),去括號(hào)得:3﹣x+7=12x﹣120,移項(xiàng)、合并得:﹣13x=﹣130,系數(shù)化為1得:x=1078.去分母得:8﹣(7+3x)=2(3x﹣10)﹣8x去括號(hào)得:8﹣7﹣3x=6x﹣20﹣8x移項(xiàng)合并得:﹣x=﹣21系數(shù)化為1得:x=2179.去括號(hào),得3(x﹣)+1=5x,3x﹣+1=5x,6x﹣3+2=10x,移項(xiàng)、合并同類項(xiàng)得:﹣4x=1,系數(shù)化為1得:x=80.4(2x﹣1)﹣12=3(5x﹣3)8x﹣4﹣12=15x﹣9﹣7x=7x=﹣1;81.5(3x﹣1)=2(4x+2)﹣1015x﹣5=8x+4﹣107x=﹣1x=﹣.82.去括號(hào)得,2(﹣1)﹣4﹣2x=3,x﹣2﹣4﹣2x=3,移項(xiàng)合并同類項(xiàng)得,﹣x=9,系數(shù)化為得,x=﹣983.去括號(hào)得:x﹣2﹣3x+1=1﹣x,解得:x=﹣2.84.原方程可化為:=﹣,去分母得:3(7x﹣1)=4(1﹣0.2x)﹣6(5x+1),去括號(hào)得:21x﹣1=4﹣0.8x﹣30x﹣6,移項(xiàng)、合并同類項(xiàng)得:51.8x=﹣1,系數(shù)化為1得:x=85.原方程化為:﹣=,整理得:12x=6,解得:x=86.原式變形為:+=1,把小數(shù)化為分?jǐn)?shù)、整理得:,去分母得:4(4﹣x)=12﹣(2x﹣6),去括號(hào)得16﹣4x=12﹣2x+6,移項(xiàng)、合并得:﹣2x=2,系數(shù)化為1得:x=﹣187.去大括號(hào),得:,去中括號(hào)得:,去小括號(hào)得:=0,移項(xiàng)得:y=3,系數(shù)化1得:y=688..原方程化為:(1分)去分母得:3(5x+9)+5(x﹣5)=5(1+2x)化簡(jiǎn)得:10x=3解得:.89.去分母得:5(3x+2)﹣15=3(7x﹣3)+2(x﹣2)去括號(hào)得:15x+10﹣15=21x﹣9+2x﹣4移項(xiàng)合并得:﹣8x=﹣8系數(shù)化為1得:x=190.去分母得:2(2x﹣5)+3(3﹣x)=12,去括號(hào)得:4x﹣10+9﹣3x=12,移項(xiàng)、合并得:x=1391.解:,,6x﹣3x+3=8x﹣8,6x﹣3x﹣8x=﹣8﹣3,﹣5x=﹣1,.92.解:3(2x﹣1)=4(x﹣5)+12,6x﹣3=4x﹣20+12,6x﹣4x=﹣20+12+3,2x=﹣5,93.去分母得:4×3x﹣5(1.4﹣x)=2去括號(hào)得:12x﹣7+5x=0.2移項(xiàng)、合并得:17x=9系數(shù)化為1,得x=94.去分母得:2(3x﹣2)+10=5(x+3),去括號(hào)得:6x﹣4+10=5x+15,移項(xiàng)、合并同類項(xiàng)得:6x﹣5x=15﹣6,化系數(shù)為1得:x=995.去分母,得3(x﹣3)﹣4(5x﹣4)=18,去括號(hào),得3x﹣9﹣20x+16=18,移項(xiàng)、合并同類項(xiàng),得﹣17x=11,系數(shù)化為1,得x=﹣;96.去分母,得3(x+1)﹣12=2(2x﹣1),去括號(hào),得3x+3﹣12=4x﹣2,移項(xiàng)、合并同類項(xiàng),得﹣x=7,系數(shù)化為1,得x=﹣797.原方程可化為:(8x﹣3)﹣(25x﹣4)=12﹣10x,去括號(hào)得:8x﹣3﹣25x+4=12﹣10x,移項(xiàng)、合并同類項(xiàng)得:﹣7x=11,系數(shù)化為1得:x=98.去分母得:4(2x+4)﹣6(4x﹣3)=3,去括號(hào)得:8x+16﹣24x+18=3,移項(xiàng),合并同類項(xiàng)得:﹣16x=﹣31,系數(shù)化為1得:x=;99.去中括號(hào)得:(x﹣1)﹣2=2x﹣5,去小括號(hào)得:x﹣1﹣2=2x﹣5,移項(xiàng)、合并同類項(xiàng)得:x=2100..把中分子,分母都乘以5得:5x﹣20,把中的分子、分母都乘以20得:20x﹣60.即原方程可化為:5x﹣20﹣2.5=20x﹣60.移項(xiàng)得:5x﹣20x=﹣60+20+2.5,合并同類項(xiàng)得:﹣15x=﹣37.5,化系數(shù)為1得:x=2.5101.去括號(hào)得:70%x+16.5﹣55%x=19.5.移項(xiàng)得:70%x﹣55%x=19.5﹣16.5.合并同類項(xiàng)得:0.15x=3.系數(shù)化為1得:x=20102.去分母得:2(x+3)﹣(2﹣3x)=4﹣8x去括號(hào)得:2x+6﹣2+3x=4﹣8x移項(xiàng)合并得:13x=0化系數(shù)為1得:x=0103.原方程變形為:3x+9=6x﹣x+13x﹣5x=1﹣9﹣2x=﹣8∴x=4;104.原方程移項(xiàng)得:﹣6x+=1﹣合并得:﹣x=﹣系數(shù)化為1得:x=105.把分母化為整數(shù)得:2.4﹣=20﹣40x去分母得:9.6﹣(10x﹣50)=80﹣160x去括號(hào)得:9.6﹣10x+50=80﹣160x移項(xiàng)、合并得:150x=20.4化系數(shù)為1,得x=0.136106.去括號(hào)得:2﹣3x=﹣x﹣2x=﹣2,﹣2x=﹣,x=.107.原方程變形為:6x﹣3﹣2(2﹣5x)=9,16x=16,x=1108.原方程變形為:200(2﹣3y)﹣4.5=﹣9.5,∴400﹣600y﹣4.5=1﹣100y﹣9.5500y=404∴y=109.去分母得:18(x+1)﹣2(x﹣1)=24(x﹣1)﹣21(x+1),去括號(hào)得:18x+18﹣2x+2=24x﹣24﹣21x﹣21,移項(xiàng)、合并同類項(xiàng)得:13x=﹣65,系數(shù)化為1得:x=﹣5110.去分母得:3(3x﹣1)+18=1﹣5x,去括號(hào)得:9x﹣3+18=1﹣5x,移項(xiàng)、合并得:14x=﹣14,系數(shù)化為1得:x=﹣1;111.去括號(hào)得:x﹣x+1=x,移項(xiàng)、合并同類項(xiàng)得:x=﹣1,系數(shù)化為1得:x=﹣.112.原方程可化為:﹣=1,=1,x﹣0.4=0.6,x=1;113.原方程可化為:(2x+2)﹣x=1,2(2x+2)﹣3x=6,4x﹣3x=6﹣4,x=2114.,化簡(jiǎn)得:,去分母得:8﹣90x﹣6(13﹣30x)=4(50x+10),去括號(hào)、合并同類項(xiàng)得:110x=﹣110,系數(shù)化為1得:x=﹣1115.原方程可化為:6﹣10x﹣3+5x﹣=去分母,得24﹣40x﹣12+20x﹣(3x﹣5)=2去括號(hào),得24﹣40x﹣12+20x﹣3x+5=2移項(xiàng)、合并同類項(xiàng),得﹣23x=﹣15系數(shù)化為1,得x=116.原方程可化為:﹣=去分母得:10(2﹣10x)﹣45=12(1﹣3x)去括號(hào)得:20﹣100x﹣45=12﹣36x移項(xiàng)、合并同類項(xiàng)得:﹣64x=37系數(shù)化為1得:x=117.77z+18=14z﹣45,77z﹣14z=﹣45﹣18,63z=﹣63,z=﹣1;118.3(2x﹣1)﹣3(4x+3)=3x,6x﹣3﹣12x﹣9=3x,﹣9x=12,;119.3x﹣2+10=x+6,2x=﹣2,x=﹣1120.原方程變形為,去分母,得3×(30x﹣11)﹣4×(40x﹣2)=2×(16﹣70x),去括號(hào),得90x﹣33﹣160x+8=32﹣140x,移項(xiàng),得90x﹣160x+140x=32+33﹣8,合并同類項(xiàng),得70x=57,系數(shù)化為1,得.121.分母化整得:﹣=1去分母得:2(50x﹣10)﹣3(30x﹣12)=6去括號(hào)得:100x﹣20﹣90x+36=6移項(xiàng)、合并同類項(xiàng)得:10x=﹣10系數(shù)化1得:x=﹣1122.原式變形為:6(4x+9)﹣10(3x+2)=15(x﹣5)24x+54﹣30x﹣20=15x﹣75﹣21x=﹣109,∴x=;123.原式變形為:3(5x﹣2)=2(7x+8)15x﹣6=14x+16∴x=22124.去分母得,20(x﹣3)﹣50(x+4)=16,去括號(hào)得20x﹣60﹣50x﹣200=16,移項(xiàng)合并得,﹣30x=276,系數(shù)化為1得,x=﹣9.2125.2(x+1)+=﹣1,去分母得:12(x+1)+2(x﹣3)=21x﹣6,去括號(hào)得:12x+12+2x﹣6=21x﹣6,移項(xiàng)得:12x+2x﹣21x=﹣6+6﹣12合并同類項(xiàng)得:﹣7x=﹣12兩邊同除以﹣7得:x=;126.=3﹣,去分母得:4(1﹣x)=36﹣3(x+2),去括號(hào)得:4﹣4x=36﹣3x﹣6,移項(xiàng)得:﹣4x+3x=36﹣6﹣4,合并同類項(xiàng)得:﹣x=26,兩邊同除以﹣1得:x=﹣26127.去分母得:3(4﹣x)﹣2(2x+1)=6去括號(hào)、移項(xiàng)合并得:﹣7x=﹣4系數(shù)化為1得:x=;128.去分母得:10x﹣5(x﹣1)=20﹣2(x+2)去括號(hào)得:5x+5=16﹣2x移項(xiàng)合并得:7x=11系數(shù)化為1得:x=129.左右兩邊同乘6得:40x+16=42﹣90x,化簡(jiǎn)得:130x=26,解得:x=;故原方程的解為:x=.130.2{3[4(5x﹣1)﹣8]﹣20}﹣7=1,去小括號(hào),得2{3[20x﹣12]﹣20}﹣7=1,去中括號(hào),得2{60x﹣56}﹣7=1,去大括號(hào),得60x﹣56=4,移項(xiàng),合并同類項(xiàng),得60x=60,系數(shù)化為1,得x=1;131.先去大括號(hào),得=2,去中括號(hào),得,去小括號(hào),得,移項(xiàng),系數(shù)化為1,得x=5;132.先去小括號(hào),再去中括號(hào)、大括號(hào),及時(shí)合并同類項(xiàng),得x﹣2[x﹣3x﹣12﹣5]=3{2x﹣[x﹣8x+32]}﹣2,x+4x+34=3{2x+7x﹣32}﹣2,5x+34=27x﹣98,﹣22x=﹣132,x=6;133.先把系數(shù)化為整數(shù),得,再去分母,兩邊都乘以60,得5(18﹣80x)﹣3(13﹣3x)﹣20(50x﹣4)=0,去括號(hào),合并同類項(xiàng),得﹣1310x+131=0,移項(xiàng),系數(shù)化為1,得;134.去分母,得,,去括號(hào),整理,得,去分母3,解得135.分母化為整數(shù)得:﹣=,去分母得:6(4x+9)﹣15(x﹣5)=10(2x+3),去括號(hào)得:24x+54﹣15x+75=20x+30,移項(xiàng)得:11x=99,同除以11得:x=9.136.去分母得:1﹣=4,再去分母得:3﹣1﹣(1﹣x)=12,去括號(hào)得:2﹣+x=12,移項(xiàng)得:x=10=,同除以得:x=21.137.去小括號(hào)得:{[﹣﹣6]+4}=1,再去中括號(hào)得:{+4}=1,再去大括號(hào)得:,移項(xiàng)得:=,同除以得:x=5138.去分母可得:7(5x+15)﹣2(2x﹣10)=14;移項(xiàng)可得:31x+111=0;即x=.故原方程的解為x=139.去小括號(hào)得:﹣[x﹣x+]﹣=x+,去中括號(hào)得:﹣x+x+﹣=x+,移項(xiàng)合并得:,系數(shù)化為1得:x=﹣140.整理,得,去分母,得6(4x+9)﹣10(3+2x)=15(x﹣5),去括號(hào),得24x+54﹣30﹣20x=15x﹣75,移項(xiàng),得24x﹣20x﹣15x=﹣75﹣54+30,合并,得﹣11x=﹣99,系數(shù)化為1,得x=9141.﹣=3,﹣=3,5x﹣10﹣20(x+1)=3,x=﹣2.2.142.去分母、去括號(hào),得10x﹣5x+5=20﹣2x﹣4,移項(xiàng)及合并同類項(xiàng),得7x=11,解得x=;方程可以化為:﹣=,整理,得2(4x﹣1.5)﹣5(5x﹣0.8)=10(1.2﹣x),去括號(hào)、移項(xiàng)、合并同類項(xiàng),得﹣7x=11,解得,x=﹣144.去分母得6+6x﹣2x+1=3x+2x﹣4移項(xiàng)、合并同類項(xiàng)得﹣x=﹣11解得x=11;145去分母得5x+5﹣2x+10=1移項(xiàng)、合并同類項(xiàng)得3x=﹣14解得146.去分母得:7(1﹣2x)=3(3x﹣4)+21×2去括號(hào)得:7﹣14x=9x﹣12+42移項(xiàng)合并同類項(xiàng)得:﹣23x=23系數(shù)化一得:x=﹣1147.去分母得3(x+1)﹣2(3x﹣2)=6(x﹣1),去括號(hào)得3x+3﹣6x+4=6x﹣6,移項(xiàng)得3x﹣6x﹣6x=﹣6﹣3﹣4,合并得﹣9x=﹣13,系數(shù)化為x=148.去分母得:x+6+12+24﹣48=0,移項(xiàng)得:x=48﹣24﹣12﹣6,合并同類項(xiàng)得:x=6.149..去分母得:2(x﹣2)+6x=9(3x+5)﹣(1﹣2x),∴﹣21x=48,∴x=﹣150.去分母的,2(x+4)﹣10(x﹣5)=5(x﹣2)﹣20,去括號(hào)得,2x+8﹣10x+50=5x﹣10﹣20,移項(xiàng)得,2x﹣10x﹣5x=﹣10﹣20﹣8﹣50,合并得,﹣13x=﹣88,系數(shù)化為1得,x=151.去括號(hào)得:x﹣x+x﹣1=x﹣1,移項(xiàng)得:﹣x+x﹣x=﹣1+1,合并同類項(xiàng)得:﹣x=0,把x的系數(shù)化為1得:x=0152.去分母得:4(3x+1)﹣2(5x﹣2)=8,去括號(hào)得:12x+4﹣10x+4=8,移項(xiàng)得:12x﹣10x=8﹣4﹣4,合并同類項(xiàng)得:2x=0,把x的系數(shù)化為1得:x=0153.原方程可化為,即9x﹣3=10x﹣14﹣12,∴9x﹣10x=﹣14﹣12+3,﹣x=﹣23,解得x=23154.∵∴,∴30x﹣18+12x=4x+20,∴38x=38,∴x=1155解:去分母,得4(2y﹣1)﹣3(4y+1)=24,去括號(hào),得8y﹣4﹣12y﹣3=24,移項(xiàng),得8y﹣12y=24+4+3,合并同類項(xiàng),得﹣4y=31,化系數(shù)為1,得y=﹣;156.去括號(hào),得x﹣1=x﹣3,去分母,得5x﹣10=4x﹣30,移項(xiàng),得5x﹣4x=10﹣30,合并同類項(xiàng),得x=﹣20157.方程兩邊同乘以10得:5(x﹣3)﹣2(4x+1)=10,整理得:5x﹣15﹣8x﹣2﹣10=0,即:﹣3x=27,x=﹣9158.去分母,得:2(5﹣x)﹣3(2x﹣3)﹣6x=12;去括號(hào),得:10﹣2x﹣6x+9﹣6x=12,移項(xiàng),得:﹣2x﹣6x﹣6x=12﹣10﹣9合并同類項(xiàng)得:﹣14x=﹣7,解得:x=159.原方程可化為:,即,,解得x=6160.由原方程去分母,得7﹣14y=21﹣9y﹣6,移項(xiàng)、合并同類項(xiàng),得﹣5y=8,化系數(shù)為1,得y=﹣161.去分母得:3(5x+)=2(6x﹣)﹣(x+4),移項(xiàng)得:15x﹣12x+x=﹣5﹣4﹣7,合并同類項(xiàng)得:4x=﹣16,兩邊同除以4得:x=﹣4162.去分母得3(x+2)﹣4(1﹣)=2(2x﹣5),去括號(hào)得3x+6﹣4+4x﹣10=4x﹣10,移項(xiàng)得3x+4x﹣4x=﹣10+10﹣6+4,合并同類項(xiàng)得3x=﹣2,系數(shù)化為1得x=﹣163.去分母得:18y﹣6﹣24=20y﹣28,移項(xiàng)得:18y﹣20y=﹣28+6+24合并同類項(xiàng)得:﹣2y=2,系數(shù)化1得:y=﹣1;164.去中括號(hào)得:2(﹣1)﹣4﹣2x=3,去括號(hào)得:x﹣2﹣4﹣2x=3,移項(xiàng)得:x﹣2x=3+2+4,合并同類項(xiàng)得:﹣x=9,系數(shù)化1得:x=﹣9165.去分母,得,4(2x+1)﹣3(1﹣5x)=24,去括號(hào),得8x+4﹣3+15x=24,移項(xiàng)、合并同類項(xiàng),得23x=23,系數(shù)化為1,得x=1.166.去分母,得6(x﹣2)﹣90=3(x+3)﹣10(2x﹣5),去括號(hào)、移項(xiàng),得6x﹣3x+20x=9+50+12+90,合并同類項(xiàng),23x=161,系數(shù)化為1,得x=7;167.去分母,得6x﹣2(x+3)=3(﹣x+3),去括號(hào)、移項(xiàng),得6x﹣2x+3x=9+6,合并同類項(xiàng),7x=15,系數(shù)化為1,得x=168.等式的兩邊同時(shí)乘以0.6,得3x﹣0.6=3.4﹣4x+0.5+2x,移項(xiàng)、合并同類項(xiàng),得5x=4.5,化未知數(shù)的系數(shù)為1,得x=0.9169.去分母得3x﹣3=x﹣1,移項(xiàng)得3x﹣x=﹣1+3,合并得2x=2,系數(shù)化為1得x=1;170.去母得5(x﹣2)﹣2(x+1)=3,去括號(hào)得5x﹣10﹣2x﹣2=3,移項(xiàng)得5x﹣2x=3+10+2,合并得3x=15,系數(shù)化為1得x=5171.由原方程去分母,得4(2x﹣5)=3(x﹣3)﹣1,去括號(hào),得8x﹣20=3x﹣9﹣1,移項(xiàng)、合并同類項(xiàng),得5x=10,化未知數(shù)的系數(shù)為1,得x=2172.去分母,得:3(3x﹣1)=(5x﹣7)+12,去括號(hào),得:9x﹣3=10x﹣14+12,移項(xiàng),得:9x﹣10x=﹣14+12+3合并同類項(xiàng),得:﹣x=1,系數(shù)化為1得:x=﹣1173.整理得,﹣=1,去分母,得4(1﹣2x)﹣3(7﹣10x)=12,去括號(hào),得4﹣8x﹣21+30x=12,移項(xiàng)、合并同類項(xiàng),得22x=29,系數(shù)化為1,得x=174.去分母,得3(2x﹣1)﹣2(1+3x)=6﹣(x+4),去括號(hào),得6x﹣3﹣2﹣6x=6﹣x﹣4,移項(xiàng),得6x﹣6x+x=6﹣4+3+2,合并同類項(xiàng),x=7175.去分母得:12x﹣4﹣6x﹣3=12,移項(xiàng)得:12x﹣6x=12+7,合并同類項(xiàng)得:6x=19,系數(shù)化1得:x=176.去分母,得6x﹣2.8﹣10x+19=15﹣10x,移項(xiàng)、合并同類項(xiàng),得6x=﹣1.2將未知數(shù)的系數(shù)化為1,得x=﹣0.2177.去分母,得18x﹣6﹣20x+28=24,移項(xiàng)、合并同類項(xiàng),得﹣2x=2,化未知數(shù)的系數(shù)為1,得x=﹣1;178.由原方程,得2(x﹣3)﹣5(x+4)=16,去括號(hào),得2x﹣6﹣5x﹣20=16,移項(xiàng)、合并同類項(xiàng),得﹣3x=42,化未知數(shù)的系數(shù)為1,得x=﹣14179.去分母得2(2x+1)﹣6=10x+1,去括號(hào)得4x+2﹣6=10x+1,移項(xiàng)得4x﹣10x=1﹣2+6,合并得﹣6x=5,系數(shù)化為1得x=﹣180.去分母得:6(x﹣9)﹣22(x+2)=66(x﹣1)﹣33(x﹣2),去括號(hào)得:6x﹣54﹣22x﹣44=66x﹣66﹣33x+66,移項(xiàng)合并得:﹣49x=98,系數(shù)化為1得:x=﹣2;181.方程可變形為﹣+=0,去分母得:5(2x+1)﹣2(4x﹣1)+25=0,去括號(hào)得:10x+5﹣8x+2+25=0,移項(xiàng)合并得:2x=﹣32,系數(shù)化為1得:x=﹣16182.由原方程,得化簡(jiǎn),得即∴=,去分母,得10=35﹣25x解得x=1183.去分母得,(2x+1)﹣(4x﹣5)=1,去括號(hào)得,2x+1﹣4x+5=1,移項(xiàng)得,2x﹣4x=1﹣5﹣1,合并同類項(xiàng)得,﹣2x=﹣5,系數(shù)化為1,x=184.移項(xiàng)得:z﹣z=﹣﹣,合并同類項(xiàng)得:z=﹣1185.去分母得:5(3x﹣1)﹣2(5x﹣6)=2,去括號(hào)得:15x﹣5﹣10x+12=2,移項(xiàng)合并得:5x=﹣5,解得:x=﹣1186.去分母得:3(x﹣1)﹣12=2(2x+1),去括號(hào)得:3x﹣3﹣12=4x+2,移項(xiàng)合并得:﹣x=17,解得:x=﹣17;187.方程變形得:5(x﹣1)﹣2(x+1)=2,去括號(hào)得:5x﹣5﹣2x﹣2=2,移項(xiàng)合并得:3x=9,解得:x=3188.去分母得,3(x﹣1)=8x+6,去括號(hào)得,3x﹣3=8x+6,移項(xiàng)得,3x﹣8x=6+3,合并同類項(xiàng)得,﹣5x=9,系數(shù)化為1得,x=﹣;189.方程可化為﹣=3,即5x﹣10﹣2x﹣2=3,移項(xiàng)得,5x﹣2x=3+10+2,合并同類項(xiàng)得,3x=15,系數(shù)化為1得,x=5;190.去分母得,3(x+2)﹣12=2(2x﹣1),去括號(hào)得,3x+6﹣12=4x﹣2,移項(xiàng)得,3x﹣4x=﹣2﹣6+12,合并同類項(xiàng)得,﹣x=4,系數(shù)化為1得,x=﹣4191.解:去分母,得3(x+2)﹣2(x﹣3)=12去括號(hào),得3x+6﹣2x+6=12移項(xiàng)、合并同類項(xiàng),得X=0;192.解:去中括號(hào),得=1,去小括號(hào),得﹣1+3﹣x=1移項(xiàng),合并同類項(xiàng),得﹣x=﹣1系數(shù)化為1,得x=193.去分母得,2(x﹣1)+3(2x﹣1)=6﹣6x,去括號(hào)得,2x﹣2+6x﹣3=6﹣6x,移項(xiàng)得,2x+6x+6x=6+3+2,合并同類項(xiàng)得,14x=11,系數(shù)化為1得,x=194.去分母得,6(3x+4)﹣12=7﹣2x,去括號(hào)得,18x+24﹣12=7﹣2x,移項(xiàng)得,18x+2x=7﹣24+12,合并同類項(xiàng)得,20x=﹣5,系數(shù)化為1得,x=﹣195.去分母得:6x﹣3﹣4x﹣10=6x﹣7﹣6,移項(xiàng)合并得:4x=0,系數(shù)化為1得:x=0196.去分母得:4(2x﹣1)=3(x+2)﹣12,去括號(hào)得:8x﹣4=3x+6﹣12,移項(xiàng)、合并得:5x=﹣2,系數(shù)化為1得:x=﹣;197.化簡(jiǎn)得:,去分母得:﹣7﹣30x=6x﹣20﹣8x,移項(xiàng),合并得:﹣28x=﹣13,系數(shù)化1,得:x=198.去分母得:10x+15﹣2x+14=5,移項(xiàng)合并得:8x=﹣24,系數(shù)化為1得:x=﹣3199.原方程去括號(hào)得:x﹣=1,移項(xiàng)得,x=1+,合并同類項(xiàng)得,x=,系數(shù)化為1得,x=×120=125200.去括號(hào),得4x+﹣6x=4﹣3x﹣2x移項(xiàng),合并同類項(xiàng),得3x=系數(shù)化為1,得x=.201.去小括號(hào),得[﹣﹣2]+2x=3去中括號(hào),得x﹣+2x=3移項(xiàng),合并同類項(xiàng),得3x=系數(shù)化為1,得x=202.原方程即:=﹣1去分母得:4(2y﹣10)=3(y+20)﹣12去括號(hào)得:8y﹣40=3y+60﹣12移項(xiàng)得:8y﹣3y=60﹣12+40即:5y=88解得:y=203.去分母得:3(x﹣2)=12﹣2(4﹣3x)﹣(2﹣3x),去括號(hào)得:3x﹣6=12﹣8+6x﹣2+3x,移項(xiàng)合并得:﹣6x=8,解得:x=﹣204.去分母,得10y﹣5(y﹣1)=30﹣2(y+2),去括號(hào),得10y﹣5y+5=30﹣2y﹣4,移項(xiàng)合并同類項(xiàng),得7y=21,系數(shù)化為1,得y=3.205.把分母化為整數(shù)得:+x=,去分母得:3(10x﹣6)+12x=4(x+10),去括號(hào)得:30x﹣18+12x=4x+40,移項(xiàng)、合并同類項(xiàng)得:x=206.去分母得,4(2t﹣6)﹣3(2t﹣4)=24,去括號(hào)得,8t﹣24﹣6t+12=24,移項(xiàng)得,8t﹣6t=24+24﹣12,合并同類項(xiàng)得,2t=36,系數(shù)化為1得,t=18207.去分母得,2(x+1)﹣4=8+2﹣x,去括號(hào)得,2x+2﹣4=8+2﹣x,移項(xiàng)得,2x+x=8+2﹣2+4,合并同類項(xiàng)得,3x=12,系數(shù)化為1得,x=4208.去分母,得2x﹣4+8x=7﹣5x,移項(xiàng)、合并同類項(xiàng),得15x=11,化未知數(shù)系數(shù)為1,得x=;209.去括號(hào),得0.7x+15﹣0.5x=18,移項(xiàng)、合并同類項(xiàng),得0.2x=3,化未知數(shù)系數(shù)為1,得x=15210.去分母得:5x﹣(x﹣6)=10,去括號(hào)、移項(xiàng)得:5x﹣x=10﹣6,合并同類項(xiàng)得:4x=4,系數(shù)化為1得:x=1.211.去分母得,5(2x﹣1)﹣15=3(3x+1),去括號(hào)得,10x﹣5﹣15=9x+3,移項(xiàng)得,10x﹣9x=3+5+15,合并同類項(xiàng)得,x=23;212.把方程兩邊同時(shí)乘以得,﹣=﹣0.13,去分母得,5(x+4)﹣2(x﹣3)=﹣1.3,去括號(hào)得,5x+20﹣2x+6=﹣1.3,移項(xiàng)得,5x﹣2x=﹣1.3﹣6﹣20,合并同類項(xiàng)得,3x=﹣27.3,化系數(shù)為1得,x=﹣9.1;213.去小括號(hào)得,2[x﹣x+]=,去中括號(hào)得,x﹣3x+=,移項(xiàng)得,x﹣3x=﹣,合并同類項(xiàng)得,﹣x=0,系數(shù)化為1得,x=0214..去分母得:5(x+1)﹣3(x﹣2)=45,去括號(hào)得:5x+5﹣3x+6=45,移項(xiàng)合并得:2x=34,解得:x=17215.去分母得,18x+3(x﹣1)=18﹣2(2x﹣1),去括號(hào)得,18x+3x﹣3=18﹣4x+2,移項(xiàng)得,18x+3x+4x=18+2+3,合并同類項(xiàng)得,25x=23,系數(shù)化為1得,x=216.去分母(方程兩邊都乘以12)得,4(2x+1)﹣3(5x﹣2)=24,去括號(hào)得,8x+4﹣15x+6=24,移項(xiàng)得,8x﹣15x=24﹣4﹣6,合并同類項(xiàng)得,﹣7x=14,系數(shù)化為1得,x=﹣2去括號(hào)得:[x﹣x+]=x+,

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