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1、解一元一次方程100道练习题1. 2x+1=76.x-9= 4x+ 27第18页2.5x2=83.3x+3= 2x+78.3 -x= -x + 1629.2x+6= 14. x+ 5= 3x710. 10x A 95. 11x-2= 14x-911. 5x2= 7x+ 81x16. 2x = +23312.,3八，51x=3x-|2217. 4 (x+ 0.5) + x=718. -2 (x1) =413. 4x-2=3 x14. -7x+ 2= 2x-419. 5 (x-1) =115.2 一x=x + 1520. 2- (1 x) = 221. 1仅+ 1=5(2x + 1)26. -2
2、(x 2) =1227. 12(2 3x) =4x+ 422. 4x-3(20-x) =32、23. 5(x+8) 5= 028. 6)-3( x+-)24. 2 (3- x) =929. 2(20015x) =70+ 25x25. 3 (x+3) =2430. 32x+1) =1231.x2 = x5436.1，,- 1，-(x 1) =2(x+2)2532.1 /、1 /、37. (x + 14) = (x + 20)7438.1 /、1 /、33. x + 1) = - 2x-3)371_11/、二(x + 15) = - - - (x 7)5231 / 八 1 / 八34. - x+1
3、) = -x1)4339.113x=一4242x1x+2 ,35. =140.41.2XZ1 =5X1683246 (200+ x) (300 x) =300 101092542.”7=9x 2647. 83x1) 9(5x11) -2(2x-7) =301 1_ 一、.43. -x (3-2x) = 15248.1x+1 =44.2x+15x 1=161 /.、45. 一(2x+14)=4 2x 7x 0.5x10.1x+2,49. -= - 10.20.350.x 10.3x + 2-=120.51,51. 2x 1 x 423 2 156. -( x 1) 22 3 252. 0.8x
4、0.1 0.5x 0,7157. 21 3(x2(2x10 3x3)1553. x 4 2x 3 -x221小 _58. - (2x 3)1 小 ，、1 小1-(2x 4) -(2x 5) -(2x 6) 3453x 154.59. 5x+2=7x- 855.2x 3 x 16360. 7 2x 13 4x 12 3x 21 061.5x 176366.(1x 1) 8 2x 14 3 24262.7 2y 121122y22y 1367.5 7x 12(-x32-(6x 9)63.2x 168.64.65.2 18x x -2x 1 269.(x 1) 30% (100 x)25%70.2
5、3x 5 x x1271.1111,X 16 4 3 276. 234(5x-1)-8-20-7=172.2(2x-1)-4(4x-1)-5(2x+1)-19=077. 2(0.3x-4)-5(0.2x+3)=973.3x 1 3x 5 x 411 2346278. 2(x+3)-2(x+1)-5=074.0.4x 0.9 0.1x 0.5 0.03 0.02x0.50.20.0379. 3x-T 16 丁75.3 2 11-(x 1) 2 2 2 3 422x380.0.150.21.681.4) 6 8 186. 10x+7=12x 5 3x87. 8x-4+2x= 4x 382. 3x=
6、2x+588. 2(3x+4)=6-5(x-7)83. 2y+3=y- 184. 7y=43y89.x2x 415x 1223685.2 1-y=-5 390.11,x (x2291.空 2.5吆空3.592.93.94.0.010.296. 3(x+2)-3(2x-3)=2(2x-3)-2 (x+2)(x 5)111197. 333(3x-2)-2-2=04x 1.5 5x 0.81.20.50.20.198. 5(y + 8) 5 = 4(2y7)1 x x 2x-V=-6-12399. -x -(1 322 3x60.4y 0.9 y 5 0.3 0Oy0.5- 2 =0.3100.1.
7、8 8x1.21.3 3x25x 0.40.3答案1.x=328135.x= - 67.x100. x=-2.x=259103.x=436.x=368.3 x54.x=637.x=-28738.569.225305065.x=x=一x3163576.39.x=570.16x=-1240.13x 25x=7.x=41471.x=88.x=-3241.x=-172.x=-19.542.2073.x=-3x= x=2374.x=910.6 x= 543.25 x=1275.18x=T11.x=-544.x=-376.x=112.1777.x=-80x= - _45.x= 一3878.3x=-13.x
8、=146.x= 216214.x- 2 x47.x=379.52332948.x= 15.51580.24.96x=-36481.x=149.x= 一16.x=11382.x=517.x=150.x- 29 x83.y= 418.x=-12284.y=7651.x =2519.x= 一552.x =-285.5y=20.x=-353.x =7621.x=454.x =186.x=- 1222.x=955.x =-5187.x=-23.x=-71656.x =3-3388.x=324.x= 2289.757.x=-x=-25.x=-117226.x=-411758.x =-90.x=x1 x2627.259.x=591.2x 28.1075x=60.x 9892.x =629.x=661.x=393.x=-230.312x= 一262.y -294.x 731.x=863.x=095.y=9164.x=696.x=1232.x= 一5697.x=18665.x -33.x=-16798.y=2134.x=7199.166.x 7-x=-42