1、七年级数学上册一元一次方程专项练习题575 x 1 x 0.4x0.56.82.6x3 6 9 2 1 6x9x 2(x1)3(x2)93 5 1 2 (8x2)x3 7x9(7x)92 5 y3 y2 7 3x4.5(x8)20 4 6 1 2 (12x)(5x4) 9(3x4)76 3 7 x 1 x 0.7x0.97.86.4x9 2 9 4 1 3x3x 6(x9)8(x2)49 2 1 2 (9x7)x3 6x4(7x)55 5 y3 y3 4 5x6(x4)40 2 6 1 2 (44x)(3x3) 9(2x3)177 5 7 x 1 x 0.1x0.85.85.1x9 8 6 4
2、 1 8x8x 8(x7)2(x9)85 5 1 2 (5x2)x6 2x4(2x)64 5 y2 y1 1 4x6.5(x9)30 4 5 1 2 (32x)(3x5) 7(9x5)82 7 7 x 1 x 0.2x0.859.4x6 8 9 2 1 8x1x 2(x8)4(x6)209 7 1 1 (7x8)x8 9x6(16x)54 5 y2 y3 2 1x5(x8)10 2 5 1 2 (14x)(2x1) 5(9x9)72 9 7 x 1 x 0.2x0.35.58.5x9 8 9 2 1 8x8x 5(x8)4(x7)135 8 1 1 (7x2)x6 8x8(6x)44 5 y1
3、 y2 6 1.5x1(x4)35 4 5 1 2 (23x)(2x3) 3(3x6)167 5 5 x 1 x 0.6x0.58.27.8x9 8 6 4 1 5x7x 9(x5)9(x8)173 9 1 1 (4x2)x9 9x4(20x)44 5 y2 y2 4 2.5x6(x7)45 2 5 1 2 (24x)(2x3) 3(3x7)84 9 7 x 1 x 0.4x0.16.94.2x3 2 9 2 1 6x3x 7(x8)2(x4)157 4 1 2 (7x7)x4 6x8(1x)59 5 y2 y3 3 0.5x9.5(x4)35 2 5 1 2 (42x)(2x2) 5(4x9
4、)33 5 7 x 1 x 0.7x0.18.99x6 2 6 4 1 2x8x 2(x4)9(x4)195 5 1 3 (9x3)x1 7x3(3x)62 5 y1 y3 8 4x2(x7)40 4 6 1 2 (32x)(5x4) 6(5x4)174 5 7 x 1 x 0.4x0.76.75.7x3 4 6 2 1 6x8x 7(x2)3(x9)135 8 1 4 (9x2)x5 9x4(16x)22 5 y2 y2 7 3.5x8.5(x9)30 2 5 1 2 (12x)(3x5) 4(7x2)25 9 5 x 1 x 0.5x0.93.69.4x9 4 6 8 1 4x8x 8(x1)6(x1)29 3 1 1 (9x5)x2 3x6(19x)33 5 y2 y1 9 2x4(x1)40 4 6 1 2 (52x)(3x2) 7(5x3)95 9