初一数学上册解方程专项练习题56.docx

1、初一数学上册解方程专项练习题567 x 1 x 0.7x0.77.12.8x3 6 3 8 1 3x6x 7(x4)9(x7)147 6 1 4 (5x8)x5 6x5(6x)27 5 y2 y2 7 0.5x7(x5)10 4 6 1 2 (52x)(5x5) 8(3x4)146 7 5 x 1 x 0.2x0.14.30.5x9 4 9 2 1 9x5x 7(x4)4(x5)83 2 1 2 (7x3)x5 2x8(4x)36 5 y1 y2 1 3.5x3(x1)5 2 5 1 2 (22x)(5x5) 3(9x3)123 3 5 x 1 x 0.2x0.88.14.9x9 4 6 4

2、1 3x4x 7(x8)4(x3)65 7 1 4 (8x3)x1 9x8(7x)16 5 y3 y3 4 3.5x1.5(x4)50 4 5 1 2 (22x)(3x5) 7(2x8)172 3 5 x 1 x 0.4x0.25.89.2x6 2 6 4 1 9x4x 7(x6)2(x4)207 3 1 3 (5x7)x6 8x6(19x)32 5 y1 y1 4 4x7(x9)30 3 6 1 2 (44x)(2x3) 7(3x1)59 3 7 x 1 x 0.1x0.274.5x9 6 3 4 1 2x6x 5(x5)7(x5)65 3 1 4 (4x3)x9 8x8(18x)43 5

3、y2 y3 6 5x6(x5)20 4 6 1 2 (53x)(4x3) 4(5x1)15 3 5 x 1 x 0.8x0.56.49.2x6 6 9 2 1 6x4x 2(x6)3(x3)177 8 1 2 (2x5)x8 3x8(6x)48 5 y3 y1 2 4.5x1(x7)15 3 6 1 2 (54x)(5x1) 8(7x4)39 9 5 x 1 x 0.3x0.66.92.6x3 2 9 8 1 3x9x 5(x5)5(x1)89 5 1 3 (5x3)x8 7x5(7x)85 5 y3 y2 8 2x7.5(x6)45 2 5 1 2 (42x)(5x1) 9(5x7)115

4、5 7 x 1 x 0.9x0.57.39.2x3 2 6 2 1 9x2x 6(x1)7(x9)177 3 1 3 (7x9)x1 8x2(20x)47 5 y1 y3 5 3x6.5(x5)25 3 6 1 2 (43x)(4x2) 5(5x3)183 5 5 x 1 x 0.7x0.988.6x9 6 3 2 1 6x2x 8(x3)8(x7)177 6 1 4 (5x5)x2 3x6(4x)84 5 y3 y1 2 2.5x6(x2)40 4 5 1 2 (24x)(4x5) 2(9x9)89 5 7 x 1 x 0.8x0.69.64.1x9 6 3 2 1 6x9x 7(x7)3(

5、x5)165 2 1 1 (5x5)x9 6x7(14x)59 5 y3 y1 7 2x5(x7)10 4 5 1 2 (43x)(5x5) 3(3x1)164 7 7 x 1 x 0.4x0.83.21.9x3 6 9 2 1 7x7x 5(x6)4(x8)183 2 1 1 (7x3)x2 5x7(8x)13 5 y2 y2 4 0.5x6(x1)15 4 5 1 2 (53x)(2x5) 2(9x4)92 9 7 x 1 x 0.6x0.23.44.5x9 8 6 2 1 6x3x 5(x7)4(x7)135 8 1 2 (4x7)x7 7x9(13x)26 5 y1 y2 5 2.5x

6、9.5(x1)5 2 5 1 2 (22x)(5x2) 7(8x2)132 7 5 x 1 x 0.3x0.80.58.2x6 4 9 4 1 8x8x 5(x1)3(x1)185 7 1 2 (8x5)x5 5x8(5x)72 5 y1 y2 7 5x1.5(x3)30 4 5 1 2 (32x)(4x1) 4(7x1)28 5 7 x 1 x 0.2x0.52.43.4x9 8 9 4 1 3x3x 5(x7)7(x8)87 5 1 2 (9x8)x6 6x6(11x)56 5 y2 y2 4 3x0.5(x2)40 2 5 1 2 (13x)(4x3) 7(9x9)183 5 5 x 1 x 0.6x0.50.34x3 8 3 4 1 8x5x 4(x5)8(x7)163 8 1 3 (3x8)x7 6x6(11x)59 5 y2 y1 6 3x1.5(x4)10 2 5 1 2 (34x)(3x2) 5(5x8)183 3 5 x 1 x 0.2x0.47.67.8x6 6 6 2 1 2x7x 2(x2)6(x1)209 6 1 4 (9x2)x7 6x6(16x)52 5 y3 y2 7 2x10(x7)30 4 6 1 2 (22x)(2x2) 3(9x6)19 9