七年级数学上册一元一次方程专项练习题69.docx

1、七年级数学上册一元一次方程专项练习题695 x 1 x 0.2x0.68.58.8x3 6 6 8 1 9x9x 4(x9)8(x7)167 7 1 3 (5x9)x4 5x6(13x)56 5 y1 y1 3 1x0.5(x9)10 3 5 1 2 (14x)(2x1) 6(6x4)209 9 7 x 1 x 0.3x0.19.89.7x9 6 9 8 1 3x7x 3(x6)5(x8)205 6 1 1 (5x8)x4 6x8(3x)29 5 y1 y1 4 2x5.5(x1)5 4 6 1 2 (32x)(4x2) 4(9x1)92 7 5 x 1 x 0.8x0.86.66.1x3 8

2、 3 4 1 7x5x 8(x3)9(x9)43 9 1 3 (2x1)x6 4x2(7x)73 5 y1 y2 6 4x2(x6)50 3 5 1 2 (44x)(3x4) 9(5x8)39 5 7 x 1 x 0.8x0.75.46.1x9 6 9 4 1 8x3x 6(x6)4(x3)35 7 1 4 (5x6)x5 5x4(6x)24 5 y1 y1 7 0.5x4(x9)20 3 6 1 2 (32x)(4x5) 3(2x9)113 9 5 x 1 x 0.5x0.557x3 6 3 8 1 9x3x 4(x9)9(x4)19 7 1 2 (5x4)x6 9x4(2x)18 5 y3

3、 y3 7 1.5x8.5(x1)35 4 5 1 2 (54x)(5x4) 4(2x4)192 9 5 x 1 x 0.2x0.35.98.7x6 8 3 4 1 2x4x 4(x2)2(x4)135 8 1 2 (4x4)x4 5x7(4x)52 5 y3 y3 2 3x5.5(x5)5 4 6 1 2 (54x)(4x4) 6(7x9)66 5 7 x 1 x 0.6x0.79.92.1x3 2 6 4 1 8x6x 8(x9)5(x3)75 9 1 1 (8x4)x9 5x6(12x)62 5 y3 y2 4 5x6(x7)10 4 6 1 2 (14x)(5x2) 8(3x3)39

4、5 5 x 1 x 0.7x0.52.76.3x6 6 3 4 1 3x5x 3(x7)5(x7)67 7 1 2 (3x2)x6 4x5(9x)52 5 y1 y3 1 2x3(x8)30 3 5 1 2 (52x)(2x4) 6(2x5)149 9 7 x 1 x 0.5x0.31.47.9x9 4 3 8 1 9x8x 8(x2)3(x4)29 9 1 4 (6x5)x2 9x6(19x)95 5 y3 y1 6 3x1.5(x3)10 4 6 1 2 (14x)(2x2) 9(3x5)117 5 5 x 1 x 0.6x0.70.64x6 8 9 8 1 3x1x 3(x6)7(x6)199 2 1 2 (3x7)x8 8x3(16x)69 5 y3 y2 1 2x9(x6)25 3 5 1 2 (43x)(2x3) 7(5x6)124 7