七年级数学上册解方程专项练习题4.docx

1、七年级数学上册解方程专项练习题47 x 1 x 0.1x0.48.63x6 4 9 8 1 3x1x 5(x3)4(x5)95 5 1 2 (6x8)x1 5x3(8x)45 5 y3 y1 4 0.5x2(x1)30 3 6 1 2 (53x)(2x2) 7(8x4)16 3 5 x 1 x 0.5x0.77.96.7x3 8 6 8 1 5x2x 6(x3)2(x9)145 5 1 1 (9x2)x3 5x2(4x)44 5 y1 y1 8 0.5x8(x2)5 4 5 1 2 (44x)(3x2) 9(2x2)107 3 7 x 1 x 0.4x0.66.93.4x6 2 9 8 1 9

2、x4x 4(x2)2(x4)163 8 1 1 (4x6)x4 3x5(1x)37 5 y2 y3 2 1.5x3(x5)15 2 5 1 2 (24x)(5x3) 6(2x4)169 5 5 x 1 x 0.9x0.85.83.2x6 4 6 2 1 7x7x 8(x5)3(x8)193 4 1 4 (8x5)x7 5x8(1x)98 5 y3 y2 3 2.5x8(x4)10 2 6 1 2 (34x)(4x5) 2(8x9)146 9 7 x 1 x 0.3x0.69.66.5x6 8 6 2 1 7x8x 2(x9)4(x6)175 3 1 2 (3x1)x4 5x5(12x)33 5

3、 y1 y1 1 5x8(x4)5 3 6 1 2 (14x)(3x3) 9(6x9)132 9 7 x 1 x 0.9x0.83.79.8x3 2 9 4 1 8x7x 3(x2)3(x5)185 7 1 1 (9x7)x9 5x7(7x)22 5 y3 y1 5 0.5x9(x6)25 3 6 1 2 (12x)(4x3) 2(5x7)134 3 5 x 1 x 0.1x0.42.71.6x6 6 6 4 1 5x5x 5(x7)7(x3)153 4 1 2 (5x4)x1 8x2(10x)34 5 y3 y1 6 2.5x3(x5)25 4 5 1 2 (14x)(2x1) 6(7x7)

4、56 5 5 x 1 x 0.5x0.62.15.8x9 6 9 2 1 7x7x 4(x3)8(x1)129 6 1 1 (4x8)x7 8x9(12x)37 5 y2 y3 8 4x5.5(x6)25 4 5 1 2 (23x)(4x4) 5(3x1)176 9 5 x 1 x 0.1x0.60.75.8x3 6 3 4 1 2x3x 9(x5)5(x1)199 3 1 2 (4x6)x4 3x2(12x)96 5 y1 y1 9 4x5(x3)15 2 6 1 2 (34x)(2x2) 5(5x8)194 7 5 x 1 x 0.7x0.29.90.6x3 2 6 8 1 8x6x 7(

5、x1)6(x2)17 9 1 3 (4x9)x5 6x3(1x)67 5 y1 y1 1 2x2.5(x3)5 4 6 1 2 (53x)(4x1) 6(2x9)49 9 7 x 1 x 0.2x0.81.70.2x3 2 6 2 1 6x1x 3(x3)3(x9)129 7 1 1 (9x7)x3 7x9(9x)79 5 y2 y2 6 0.5x4.5(x3)20 4 6 1 2 (12x)(4x3) 6(5x4)59 9 5 x 1 x 0.1x0.54.91x6 6 3 2 1 2x3x 5(x9)3(x1)19 7 1 2 (9x5)x8 3x7(14x)84 5 y2 y2 1 3.

6、5x5.5(x3)5 4 6 1 2 (52x)(2x3) 4(6x9)39 7 5 x 1 x 0.7x0.10.86.3x3 6 6 8 1 6x2x 3(x1)9(x3)183 8 1 4 (5x6)x8 5x5(14x)36 5 y3 y3 8 3.5x4(x5)45 2 6 1 2 (52x)(3x3) 5(7x7)18 7 5 x 1 x 0.8x0.50.54.9x3 6 9 8 1 7x4x 3(x9)6(x4)55 4 1 4 (5x6)x2 8x3(2x)24 5 y2 y2 3 1.5x3(x8)45 2 6 1 2 (52x)(3x3) 3(5x6)137 7 7 x 1 x 0.3x0.26.38x3 4 3 8 1 8x8x 9(x8)8(x6)205 7 1 2 (4x8)x8 8x5(11x)36 5 y3 y3 4 5x1.5(x4)25 2 5 1 2 (53x)(4x5) 4(2x6)18 9