七年级数学上册一元一次方程专项练习题83.docx

1、七年级数学上册一元一次方程专项练习题837 x 1 x 0.6x0.34.39.2x3 2 3 8 1 8x8x 2(x2)8(x8)145 9 1 4 (7x9)x7 4x7(14x)27 5 y1 y3 7 4.5x2(x9)40 2 6 1 2 (33x)(5x5) 7(4x3)47 7 7 x 1 x 0.4x0.79.29.8x9 8 6 4 1 4x9x 7(x6)4(x4)179 4 1 3 (6x1)x4 6x4(15x)93 5 y3 y1 4 4.5x1.5(x8)5 4 6 1 2 (22x)(5x5) 8(5x7)137 3 5 x 1 x 0.9x0.68.71.4x

2、9 6 6 8 1 3x8x 4(x6)6(x4)183 7 1 3 (4x2)x7 7x6(11x)29 5 y3 y1 7 0.5x8.5(x6)30 3 6 1 2 (42x)(2x2) 6(6x1)96 7 5 x 1 x 0.7x0.79.11.8x9 2 6 4 1 7x2x 4(x5)8(x3)185 5 1 1 (3x1)x5 3x2(8x)44 5 y3 y3 1 3.5x0.5(x4)5 3 6 1 2 (34x)(3x5) 3(6x4)203 9 7 x 1 x 0.3x0.198.4x9 8 9 4 1 2x9x 9(x9)9(x2)79 8 1 1 (3x1)x2 9

3、x7(16x)52 5 y2 y2 1 1x6.5(x3)25 3 5 1 2 (42x)(3x5) 3(7x3)26 9 7 x 1 x 0.5x0.52.45.1x6 6 9 8 1 8x1x 6(x1)6(x7)57 9 1 1 (3x5)x1 2x7(13x)96 5 y2 y1 7 1x2.5(x7)25 4 6 1 2 (53x)(4x4) 3(5x8)96 5 5 x 1 x 0.9x0.88.86.8x6 2 9 8 1 7x9x 7(x4)9(x8)33 2 1 2 (6x9)x4 6x2(6x)36 5 y2 y1 9 0.5x7.5(x3)15 3 6 1 2 (44x)

4、(4x4) 5(7x3)133 9 7 x 1 x 0.3x0.32.44.1x3 8 3 8 1 9x3x 2(x8)4(x9)145 8 1 1 (3x5)x7 9x9(17x)38 5 y1 y3 7 3.5x6(x3)30 3 5 1 2 (24x)(5x1) 9(4x5)132 7 7 x 1 x 0.2x0.32.35.6x9 4 3 4 1 8x5x 5(x5)9(x5)205 3 1 4 (5x1)x6 7x3(19x)32 5 y3 y2 7 2.5x5(x2)5 4 6 1 2 (33x)(2x1) 3(4x2)135 7 5 x 1 x 0.7x0.81.12.6x9 2 6 8 1 5x4x 6(x1)2(x9)29 8 1 4 (5x6)x3 9x4(6x)97 5 y2 y1 8 2.5x7.5(x8)15 3 5 1 2 (24x)(5x2) 8(5x1)163 3