初一数学上册解方程专项练习题12.docx

1、初一数学上册解方程专项练习题127 x 1 x 0.1x0.27.71.5x9 4 3 2 1 4x2x 4(x8)7(x5)163 5 1 1 (3x5)x9 6x7(1x)16 5 y2 y1 6 3x0.5(x8)20 4 5 1 2 (13x)(5x2) 6(7x6)96 9 5 x 1 x 0.1x0.39.68.3x6 4 6 8 1 3x5x 2(x8)2(x9)75 2 1 2 (3x3)x2 8x9(7x)99 5 y2 y2 9 1x5(x2)50 3 6 1 2 (54x)(3x3) 4(5x2)167 5 7 x 1 x 0.5x0.62.96.8x9 2 6 4 1

2、9x4x 4(x5)8(x7)127 7 1 4 (4x7)x1 7x5(11x)37 5 y2 y2 2 1.5x8.5(x5)20 4 6 1 2 (43x)(2x5) 2(2x5)166 3 7 x 1 x 0.9x0.98.43.9x3 2 6 8 1 9x3x 5(x2)5(x7)167 7 1 2 (6x2)x2 3x6(17x)62 5 y2 y1 1 4x7.5(x7)50 4 6 1 2 (24x)(3x5) 2(6x9)145 3 7 x 1 x 0.8x0.22.98.9x9 6 9 2 1 4x7x 9(x4)9(x6)103 9 1 1 (7x4)x7 5x4(10x

3、)65 5 y3 y2 7 5x2.5(x4)25 2 5 1 2 (42x)(4x5) 6(2x5)25 3 5 x 1 x 0.3x0.38.53.2x6 2 9 2 1 4x4x 9(x3)5(x2)69 8 1 1 (5x7)x4 4x3(4x)34 5 y1 y3 4 2.5x4(x5)40 2 5 1 2 (52x)(3x5) 3(2x3)167 3 7 x 1 x 0.5x0.45.22.8x3 2 3 8 1 4x6x 8(x6)3(x2)205 9 1 2 (8x4)x4 6x8(19x)79 5 y1 y2 5 1x5.5(x2)40 2 6 1 2 (52x)(5x4)

4、7(9x5)78 7 5 x 1 x 0.5x0.36.70.9x3 6 3 8 1 3x6x 2(x2)8(x4)17 5 1 4 (3x5)x5 5x5(3x)38 5 y2 y2 3 4x3.5(x2)30 4 5 1 2 (24x)(3x3) 8(4x5)207 5 7 x 1 x 0.3x0.15.40.8x6 2 6 8 1 4x2x 9(x1)2(x4)63 7 1 2 (5x2)x5 5x2(8x)76 5 y1 y2 6 3.5x6(x9)20 4 6 1 2 (43x)(5x3) 7(7x7)77 5 7 x 1 x 0.8x0.39.66.1x9 4 9 2 1 6x6x

5、 7(x8)3(x4)189 3 1 2 (8x1)x9 6x4(20x)82 5 y3 y1 1 4x2.5(x6)15 2 5 1 2 (34x)(2x1) 5(2x8)122 3 5 x 1 x 0.2x0.168.1x6 8 6 8 1 4x9x 7(x3)9(x6)105 7 1 1 (5x1)x6 6x6(19x)16 5 y3 y3 2 0.5x6.5(x1)15 4 6 1 2 (14x)(5x3) 9(3x3)109 7 5 x 1 x 0.7x0.35.47.3x9 2 9 4 1 4x6x 8(x1)6(x2)117 3 1 4 (2x4)x4 3x7(4x)24 5 y

6、3 y1 2 2.5x6.5(x8)5 3 6 1 2 (52x)(4x4) 8(3x3)172 9 5 x 1 x 0.7x0.84.74.5x6 2 6 2 1 2x9x 4(x1)5(x9)149 9 1 2 (2x4)x4 6x5(9x)57 5 y2 y2 9 2x8(x6)35 3 6 1 2 (13x)(2x5) 8(6x1)48 3 5 x 1 x 0.6x0.23.93.5x9 6 6 4 1 6x9x 3(x9)4(x9)79 7 1 2 (9x7)x8 6x5(17x)15 5 y1 y3 5 4x3.5(x9)25 2 6 1 2 (23x)(3x3) 6(3x7)109 5 7 x 1 x 0.8x0.11.69.6x9 4 6 4 1 9x2x 9(x8)7(x7)89 5 1 3 (4x5)x1 6x5(19x)98 5 y3 y2 8 4x5(x2)15 3 5 1 2 (42x)(2x4) 9(8x8)86 7 5 x 1 x 0.1x0.19.19.2x3 2 6 8 1 3x7x 3(x8)7(x3)65 9 1 4 (2x8)x7 6x8(9x)58 5 y1 y3 2 3x5(x4)35 3 5 1 2 (14x)(2x3) 4(6x7)145 3