七年级数学上册解方程专项练习题13.docx

1、七年级数学上册解方程专项练习题135 x 1 x 0.1x0.58.85.1x9 6 9 2 1 3x3x 8(x3)6(x8)105 7 1 3 (6x9)x3 7x4(4x)64 5 y2 y3 4 3x8.5(x9)5 2 5 1 2 (34x)(3x4) 6(2x1)125 5 5 x 1 x 0.9x0.39.72.5x9 6 3 4 1 7x8x 2(x9)8(x5)157 6 1 1 (2x8)x2 2x7(6x)54 5 y1 y1 9 5x6.5(x5)20 3 6 1 2 (33x)(3x3) 6(5x6)178 9 7 x 1 x 0.6x0.22.49.1x9 2 6

2、4 1 6x8x 6(x1)8(x6)199 9 1 4 (8x8)x4 2x9(6x)57 5 y3 y3 5 2x3.5(x1)20 4 6 1 2 (52x)(2x2) 6(4x4)19 9 5 x 1 x 0.8x0.36.63.9x3 6 3 2 1 8x3x 3(x5)5(x1)127 9 1 2 (8x2)x5 4x6(5x)32 5 y2 y1 5 1.5x3(x6)30 4 5 1 2 (32x)(3x4) 9(8x8)159 3 5 x 1 x 0.6x0.96.95.4x3 2 3 2 1 9x3x 2(x6)2(x8)127 3 1 4 (2x9)x2 5x2(4x)5

3、6 5 y3 y3 1 1x4(x2)50 3 5 1 2 (43x)(5x3) 7(4x9)107 5 5 x 1 x 0.3x0.39.88.4x3 4 3 8 1 3x3x 6(x9)4(x6)157 7 1 2 (4x6)x4 7x2(15x)63 5 y3 y1 7 1.5x9.5(x7)45 4 5 1 2 (43x)(5x1) 8(3x3)164 5 7 x 1 x 0.1x0.38.24.8x3 8 3 8 1 5x4x 2(x7)7(x4)103 4 1 2 (7x3)x2 7x3(14x)45 5 y2 y3 9 1x9(x7)35 3 5 1 2 (12x)(4x2) 4

4、(4x1)44 3 7 x 1 x 0.2x0.268.5x3 2 3 4 1 7x8x 6(x2)7(x4)133 6 1 1 (4x5)x3 8x7(9x)65 5 y1 y1 4 1x7.5(x4)5 2 6 1 2 (34x)(4x2) 8(8x6)182 9 5 x 1 x 0.9x0.78.16.8x3 6 3 8 1 8x3x 9(x2)3(x1)53 5 1 4 (6x2)x7 6x4(5x)68 5 y2 y1 4 4.5x9.5(x2)50 4 5 1 2 (44x)(3x1) 6(9x4)148 7 5 x 1 x 0.2x0.19.99.9x3 6 9 2 1 4x2x

5、 5(x7)6(x4)107 7 1 1 (9x9)x3 8x2(11x)22 5 y1 y2 8 4.5x0.5(x7)10 2 6 1 2 (52x)(4x3) 4(7x7)186 3 7 x 1 x 0.8x0.43.55.9x6 6 3 8 1 7x5x 8(x2)2(x4)169 3 1 3 (6x7)x8 9x2(15x)95 5 y2 y2 8 2x6.5(x8)45 4 5 1 2 (23x)(4x3) 5(7x3)19 3 7 x 1 x 0.9x0.20.47.6x6 6 3 2 1 4x4x 7(x5)6(x9)177 4 1 4 (5x7)x8 5x3(19x)16 5

6、 y2 y3 1 1.5x7(x9)15 2 6 1 2 (12x)(5x5) 2(8x2)12 5 7 x 1 x 0.6x0.96.41.2x3 4 6 2 1 2x3x 6(x8)5(x4)165 2 1 4 (5x7)x9 2x5(16x)53 5 y1 y1 8 1.5x9(x2)25 3 6 1 2 (54x)(4x3) 3(2x7)86 7 7 x 1 x 0.5x0.22.58.6x9 2 9 4 1 6x7x 3(x4)4(x3)35 6 1 4 (4x9)x5 4x9(11x)96 5 y2 y1 5 1.5x4(x8)25 3 6 1 2 (13x)(4x5) 9(9x4)105 3 7 x 1 x 0.1x0.87.77.9x9 6 9 8 1 2x1x 6(x8)9(x7)47 6 1 2 (5x2)x3 7x8(6x)95 5 y1 y2 9 3.5x1(x6)20 2 6 1 2 (43x)(2x4) 6(5x3)108 7