初一数学上册一元一次方程综合练习题15.docx

1、初一数学上册一元一次方程综合练习题157 x 1 x 0.3x0.54.80.7x6 4 6 8 1 6x5x 8(x9)7(x1)195 3 1 2 (4x6)x3 2x8(4x)29 5 y3 y1 5 1.5x1(x5)20 3 5 1 2 (14x)(2x5) 7(7x3)103 3 5 x 1 x 0.1x0.61.48.9x9 2 9 4 1 5x9x 2(x6)9(x4)129 6 1 3 (6x9)x4 2x5(2x)44 5 y2 y3 1 1.5x7.5(x2)15 4 6 1 2 (32x)(4x1) 3(4x5)78 3 5 x 1 x 0.8x0.50.81.3x9

2、4 6 2 1 8x1x 7(x9)7(x8)169 4 1 3 (3x7)x3 3x9(6x)96 5 y2 y2 6 1.5x8.5(x4)5 2 6 1 2 (44x)(3x4) 3(7x9)43 3 5 x 1 x 0.6x0.23.29.8x3 4 9 8 1 6x8x 7(x3)7(x2)129 7 1 1 (2x9)x9 4x4(4x)17 5 y2 y2 8 5x4.5(x2)20 4 6 1 2 (12x)(2x3) 8(4x3)146 9 5 x 1 x 0.3x0.91.61.1x3 4 6 2 1 6x1x 6(x4)8(x5)115 6 1 2 (8x1)x3 3x6

3、(17x)29 5 y1 y3 1 3x10(x4)45 2 6 1 2 (54x)(2x4) 9(6x4)188 9 5 x 1 x 0.6x0.16.72.1x3 2 6 2 1 6x2x 9(x1)9(x4)103 8 1 1 (4x7)x3 4x7(20x)23 5 y3 y2 1 3.5x3.5(x1)5 3 5 1 2 (34x)(5x2) 4(2x4)137 5 7 x 1 x 0.8x0.27.51.6x6 4 3 8 1 2x7x 3(x8)2(x3)39 5 1 2 (5x9)x7 6x3(14x)76 5 y3 y2 8 3x3.5(x7)45 2 5 1 2 (13x)

4、(2x5) 2(4x5)17 3 7 x 1 x 0.6x0.20.80.3x6 6 6 8 1 8x7x 5(x7)5(x6)207 5 1 2 (8x1)x1 2x8(6x)72 5 y3 y1 4 5x9.5(x8)25 4 6 1 2 (53x)(4x4) 2(8x1)54 5 5 x 1 x 0.3x0.65.14x3 2 6 8 1 4x9x 2(x7)9(x2)105 2 1 4 (9x6)x6 5x3(10x)66 5 y1 y3 4 1.5x6.5(x7)40 2 6 1 2 (43x)(2x2) 5(3x4)26 9 7 x 1 x 0.2x0.88.27.5x6 8 3 2 1 7x4x 5(x3)9(x9)103 4 1 2 (2x7)x2 6x3(14x)97 5 y2 y3 9 3x5(x7)10 2 5 1 2 (52x)(5x4) 6(3x5)143 7