七年级数学上册一元一次方程专项练习题88.docx

1、七年级数学上册一元一次方程专项练习题885 x 1 x 0.1x0.23.30.7x3 2 3 2 1 8x4x 9(x5)6(x2)147 6 1 3 (3x2)x3 6x9(2x)62 5 y2 y1 6 2x3.5(x1)10 2 5 1 2 (44x)(3x3) 5(9x4)56 9 7 x 1 x 0.9x0.78.17.1x3 8 3 2 1 9x5x 9(x4)7(x7)117 2 1 2 (2x8)x8 4x5(4x)57 5 y1 y1 4 0.5x5.5(x7)5 2 5 1 2 (13x)(2x1) 3(8x2)76 9 5 x 1 x 0.4x0.58.73.7x9 2

2、 9 4 1 5x7x 9(x1)9(x9)77 4 1 4 (3x6)x5 8x7(13x)65 5 y3 y2 4 2.5x7.5(x7)40 2 6 1 2 (43x)(4x4) 4(4x7)156 3 7 x 1 x 0.9x0.65.56.4x6 2 6 8 1 9x9x 5(x4)6(x3)45 9 1 4 (8x6)x7 9x7(8x)65 5 y3 y1 9 1.5x3(x4)45 2 5 1 2 (43x)(4x2) 8(9x3)52 5 5 x 1 x 0.3x0.53.57.9x3 6 9 4 1 5x7x 8(x9)3(x7)159 7 1 1 (4x2)x7 8x2(

3、17x)44 5 y1 y2 3 2.5x1(x9)35 3 5 1 2 (34x)(2x2) 7(9x8)133 3 5 x 1 x 0.8x0.62.63.1x3 8 9 2 1 4x7x 3(x7)2(x4)159 8 1 4 (4x3)x3 2x6(3x)12 5 y1 y3 2 4x9(x1)30 4 6 1 2 (33x)(4x5) 8(9x3)193 3 7 x 1 x 0.5x0.11.65.2x3 8 6 8 1 6x9x 4(x8)7(x1)99 8 1 3 (2x5)x4 8x6(8x)52 5 y2 y2 4 4.5x2.5(x4)15 4 5 1 2 (54x)(3x

4、2) 5(3x6)195 7 7 x 1 x 0.7x0.18.16.8x9 6 3 8 1 3x7x 8(x7)4(x3)167 7 1 2 (3x7)x3 2x2(18x)83 5 y1 y1 3 1x7(x3)15 2 5 1 2 (12x)(2x4) 3(8x8)64 3 7 x 1 x 0.3x0.30.59.1x9 6 9 8 1 4x1x 2(x2)5(x4)49 9 1 4 (3x3)x5 7x8(4x)26 5 y3 y1 2 2.5x1.5(x4)50 2 6 1 2 (52x)(3x1) 8(2x7)22 7 7 x 1 x 0.6x0.58.68.6x9 8 9 2 1 8x8x 5(x2)7(x8)185 9 1 3 (5x8)x2 4x2(4x)87 5 y1 y1 8 4.5x0.5(x4)35 2 6 1 2 (34x)(2x2) 5(3x8)198 9