初二数学二元一次方程组专项练习题 149.docx

1、初二数学二元一次方程组专项练习题 149 5a9b17 7x4y12 6a6b6 8x6y15 8x8y 1 4m5b5 5y3x 1 -9m6b4 5a8b11 4x4y-9 5a4b6 7x5y-1 3x6y 115 0.5x0.8y3.8 y4x 115 0.4x0.8y3.2 8a6b10 8x6y12 9a4b11 9x6y6 3x9y 127 m3b8 3y x 127 -10m3b8 8a5b16 x y7 5a5b2 3x5y9 2x4y 139 0.5x0.4y2 2y7x 139 0.9x0.1y1.5 8a9b5 x8y13 5a4b20 6x6y2 3x2y 27 3m

2、8b1 6y8x 27 -6m8b10 4a3b7 8x6y4 2a3b19 3x3y-10 9x3y 163 0.7x0.1y0.1 9y7x 163 0.8x0.5y0.7 a2b8 6x7y15 9a9b7 5x5y11 5x y 110 7m b23 3y3x 110 -7m6b20 9a b11 3x6y0 3a3b13 7x y-8 8x8y 188 0.3x0.4y0.2 5y7x 188 0.1x0.6y1.7 5a6b18 9x9y10 4a4b2 3x7y5 3x4y 189 3m8b2 5y9x 189 -7m6b22 6a6b10 x y-3 3a6b10 9x6y4

3、3x3y 30 0.1x0.3y1.3 y7x 30 0.2x0.4y1.5 a9b12 6x8y4 2a8b15 5x7y20 7x9y 187 m6b13 4y5x 187 -7m b13 7a2b8 x4y-2 7a7b7 2x6y-8 x y -4 0.6x0.3y1.9 7y9x -4 0.7x0.1y3.2 8a2b12 5x y7 4a6b2 6x5y4 8x6y 97 6m3b5 y6x 97 -3m6b14 9a8b20 2x8y2 4a5b10 6x6y8 9x7y 34 0.1x0.3y2.5 3y x 34 0.6x0.2y1.7 8a8b14 4x3y5 4a4b12 6x5y12 7x7y 99 m3b10 8y3x 99 -8m7b30 9a3b13 8x2y-8 9a3b11 x8y0 5x3y 69 0.7x0.1y3.1 6y8x 69 0.2x0.1y2.2 3a3b2 2x7y17 3a8b10 9x y8 6x5y 55 4m6b21 8y8x 55 -9m b27 5a8b12 3x9y2 a3b3 9x9y4 3x9y 189 0.6x0.1y1.8 3y8x 189 0.7x0.5y1.7