七年级数学上册解方程专项练习题6.docx

1、七年级数学上册解方程专项练习题65 x 1 x 0.9x0.83.42.7x9 4 9 8 1 3x5x 5(x1)2(x1)137 3 1 2 (6x7)x7 7x4(12x)68 5 y3 y1 4 2.5x10(x6)45 2 5 1 2 (12x)(5x3) 9(7x2)207 5 7 x 1 x 0.1x0.64.52.1x9 4 9 4 1 3x7x 3(x8)2(x7)55 2 1 2 (4x8)x5 4x2(13x)14 5 y1 y3 4 2x9(x1)35 2 5 1 2 (24x)(2x5) 2(6x4)199 5 5 x 1 x 0.1x0.10.78.7x3 4 6

2、2 1 3x5x 6(x4)3(x7)75 7 1 1 (5x9)x1 4x8(10x)45 5 y2 y2 2 4x4(x5)10 2 5 1 2 (24x)(5x5) 3(6x9)14 9 5 x 1 x 0.6x0.77.64.9x3 4 9 2 1 2x7x 7(x4)9(x1)129 2 1 1 (9x4)x6 5x9(4x)67 5 y2 y3 3 4x1(x8)5 4 5 1 2 (33x)(3x1) 5(7x2)205 7 5 x 1 x 0.6x0.17.45.7x3 4 3 2 1 8x3x 4(x9)3(x8)127 4 1 4 (7x9)x6 3x3(13x)73 5

3、y2 y1 5 0.5x0.5(x1)25 2 5 1 2 (23x)(3x5) 8(3x2)143 9 7 x 1 x 0.5x0.592.2x9 6 6 4 1 2x1x 4(x9)5(x5)139 2 1 2 (9x5)x3 3x4(12x)36 5 y2 y3 5 2x1.5(x7)40 4 5 1 2 (23x)(3x3) 9(4x4)68 3 7 x 1 x 0.4x0.88.50.2x3 8 6 2 1 9x4x 4(x3)7(x2)143 7 1 4 (8x3)x5 8x6(6x)36 5 y1 y1 7 4x7.5(x7)20 2 5 1 2 (22x)(2x1) 9(5x2

4、)64 9 5 x 1 x 0.4x0.32.53.7x6 8 6 8 1 3x9x 2(x3)7(x6)73 7 1 1 (5x9)x3 6x2(10x)49 5 y3 y3 1 2.5x9(x1)40 3 6 1 2 (14x)(4x1) 6(5x7)206 3 7 x 1 x 0.7x0.73.12.3x3 4 6 4 1 7x5x 2(x6)9(x2)155 4 1 1 (8x4)x9 6x7(18x)99 5 y3 y3 5 2.5x8.5(x5)35 2 6 1 2 (23x)(5x1) 5(5x7)59 7 7 x 1 x 0.4x0.55.81.6x9 6 6 2 1 5x6x

5、 9(x9)5(x4)47 9 1 3 (3x7)x7 3x7(20x)75 5 y2 y2 5 2x6(x1)35 2 5 1 2 (23x)(5x4) 2(4x6)178 9 5 x 1 x 0.9x0.26.48.7x6 8 3 2 1 3x8x 9(x8)4(x8)113 8 1 2 (9x4)x3 9x7(18x)97 5 y3 y2 6 1.5x4.5(x1)35 2 6 1 2 (52x)(2x2) 9(3x7)186 3 5 x 1 x 0.2x0.19.31x9 6 3 4 1 8x2x 2(x3)4(x2)87 2 1 1 (6x7)x4 9x6(12x)43 5 y1 y

6、1 5 2x6.5(x8)20 3 5 1 2 (52x)(2x2) 5(9x4)16 7 5 x 1 x 0.1x0.27.49.7x6 8 6 2 1 2x6x 8(x6)3(x5)203 8 1 2 (4x3)x4 2x5(4x)33 5 y3 y3 6 5x9.5(x9)10 3 6 1 2 (23x)(4x1) 5(8x4)15 5 7 x 1 x 0.9x0.84.60.1x9 2 6 4 1 6x7x 3(x4)9(x1)155 7 1 4 (8x7)x5 3x4(17x)14 5 y3 y3 7 0.5x3(x7)15 4 5 1 2 (33x)(5x2) 7(2x9)124 7 7 x 1 x 0.2x0.48.78.2x9 4 6 2 1 3x5x 3(x6)5(x3)159 2 1 4 (5x9)x6 9x4(8x)48 5 y3 y3 4 3x8(x5)30 2 6 1 2 (24x)(5x4) 5(3x2)157 9