初一数学上册解方程专项练习题16.docx

1、初一数学上册解方程专项练习题167 x 1 x 0.9x0.84.64.6x6 6 3 8 1 4x6x 5(x3)4(x2)187 7 1 1 (9x7)x6 3x3(3x)32 5 y3 y1 6 2x8.5(x4)15 4 6 1 2 (34x)(4x4) 8(8x3)64 5 7 x 1 x 0.3x0.82.74.4x6 8 9 4 1 6x9x 7(x6)8(x9)159 4 1 4 (6x5)x1 8x2(12x)88 5 y2 y1 5 3.5x7(x9)20 3 6 1 2 (12x)(2x4) 2(5x1)65 5 7 x 1 x 0.3x0.90.22.6x6 8 3 8

2、 1 9x8x 2(x3)7(x4)33 3 1 4 (6x7)x7 3x2(10x)23 5 y3 y1 5 5x8.5(x5)40 2 6 1 2 (14x)(5x1) 5(7x2)113 7 7 x 1 x 0.5x0.21.73.2x9 2 6 2 1 3x1x 9(x9)3(x7)163 5 1 4 (4x7)x5 3x8(20x)22 5 y1 y3 7 3x5(x5)40 3 6 1 2 (44x)(3x3) 8(9x3)104 7 5 x 1 x 0.5x0.61.99.4x9 4 9 4 1 3x4x 7(x3)2(x5)157 6 1 2 (7x7)x1 8x6(20x)6

3、6 5 y1 y3 4 3x5.5(x5)20 4 5 1 2 (53x)(4x1) 8(9x5)138 7 7 x 1 x 0.9x0.59.64.7x9 4 6 8 1 8x1x 8(x3)9(x1)185 4 1 4 (7x3)x2 5x2(5x)26 5 y2 y1 1 3x7.5(x9)20 3 5 1 2 (43x)(5x4) 2(8x9)194 9 5 x 1 x 0.2x0.96.72.6x9 8 6 2 1 2x6x 2(x6)2(x7)27 2 1 3 (3x8)x2 2x5(6x)47 5 y3 y3 7 5x1.5(x3)45 3 6 1 2 (24x)(4x5) 9(

4、5x8)104 3 7 x 1 x 0.2x0.33.93.7x3 8 6 8 1 9x8x 3(x8)2(x6)105 6 1 1 (4x4)x8 4x7(6x)97 5 y3 y3 5 2x7(x8)25 3 5 1 2 (43x)(4x4) 4(6x1)106 5 5 x 1 x 0.5x0.15.27.7x9 8 6 8 1 7x1x 9(x6)2(x6)197 8 1 2 (6x9)x1 7x9(9x)62 5 y3 y1 3 5x10(x5)40 3 6 1 2 (24x)(4x1) 4(9x6)112 7 7 x 1 x 0.6x0.61.45.3x6 8 6 8 1 7x4x

5、2(x2)7(x6)179 7 1 3 (8x1)x2 6x8(13x)42 5 y2 y3 4 0.5x5.5(x1)45 4 5 1 2 (12x)(5x1) 4(2x7)164 3 5 x 1 x 0.7x0.63.97.9x6 2 9 4 1 8x6x 8(x8)5(x5)25 5 1 2 (5x8)x6 5x8(8x)79 5 y2 y2 6 3.5x5(x7)30 4 6 1 2 (24x)(3x1) 5(9x9)28 3 7 x 1 x 0.2x0.62.30.7x6 2 6 8 1 3x2x 6(x2)2(x9)15 5 1 4 (4x5)x9 7x2(18x)69 5 y2

6、y1 6 5x9.5(x8)30 2 6 1 2 (24x)(2x2) 5(9x6)16 9 5 x 1 x 0.3x0.91.99.6x3 4 6 4 1 5x4x 3(x7)4(x8)167 3 1 1 (2x1)x4 5x9(10x)86 5 y1 y3 3 2x10(x3)30 3 6 1 2 (44x)(4x5) 2(6x3)25 5 5 x 1 x 0.4x0.77.48.5x3 6 9 8 1 8x9x 7(x1)5(x6)37 2 1 4 (6x7)x8 2x8(19x)53 5 y1 y3 3 3.5x7(x7)20 3 6 1 2 (42x)(2x5) 9(4x4)183 5 5 x 1 x 0.3x0.20.34.7x3 2 6 2 1 8x6x 5(x3)3(x5)45 5 1 1 (2x5)x5 4x2(13x)12 5 y3 y3 3 4x8(x9)15 2 6 1 2 (34x)(3x3) 2(3x6)59 5 7 x 1 x 0.9x0.91.39.9x3 6 3 8 1 7x3x 5(x6)6(x7)129 4 1 4 (9x5)x8 2x8(15x)64 5 y3 y3 5 5x5.5(x8)35 3 5 1 2 (42x)(3x4) 5(6x7)27 7