初二数学二元一次方程组专项练习题 90.docx

1、初二数学二元一次方程组专项练习题 90 5a3b10 6x9y16 7a9b5 9x6y18 x9y -6 3m2b10 7y6x -6 -8m3b30 8a3b11 9x8y-4 a9b10 4x6y8 7x5y -10 0.4x0.1y1.9 7y2x -10 0.5x0.3y0.4 2a4b10 9x4y17 3a7b16 2x6y16 7x y 158 5m4b12 2y4x 158 -1m b11 4a7b16 6x7y-1 4a6b4 6x5y-4 5x y 77 0.9x0.6y1.5 9y5x 77 0.1x0.4y2.1 8a3b7 7x6y11 4a4b7 7x5y16 7

2、x8y 56 6m3b0 y3x 56 -9m7b16 3a7b10 7x y-1 6a7b1 2x4y7 9x9y 46 0.2x0.5y1.6 8y2x 46 0.8x0.3y1.5 8a9b17 4x7y11 6a5b12 2x8y8 6x5y 174 9m3b22 9y5x 174 -6m5b20 9a b12 6x2y4 7a7b20 5x5y5 4x6y 200 0.5x0.9y1.4 6y7x 200 0.1x0.8y2 5a5b8 2x2y18 8a6b20 8x2y8 6x2y 140 2m4b4 6y x 140 -2m4b9 8a5b18 3x6y-10 2a2b17 3

3、x2y-1 x9y 108 0.4x0.3y0.1 3y7x 108 0.2x0.7y2.7 a9b16 2x y8 7a3b3 8x7y8 8x3y 10 2m9b12 6y x 10 -5m7b23 4a9b13 9x5y4 3a9b8 5x7y10 9x7y 11 0.1x0.9y1.1 7y3x 11 0.6x0.9y1.3 3a2b16 6x4y2 7a3b16 3x3y15 2x6y 44 8m2b5 7y x 44 -5m8b1 2a7b2 6x2y4 5a5b16 3x6y4 8x y 42 0.6x0.9y0.9 8y3x 42 0.6x0.1y1.7 8a5b3 3x3y2 4a3b16 5x9y17 5x6y 36 3m8b20 9y4x 36 -10m8b7 8a b5 8x7y-2 2a4b20 2x y-4 4x7y -3 0.8x0.7y0.1 5y7x -3 0.9x0.6y0.3 2a8b15 4x y13 9a7b12 5x9y13 2x5y 124 5m7b30 4y x 124 -5m3b22 5a6b15 4x4y-4 9a b15 x9y-5 5x y 65 0.3x0.6y3.6 5y4x 65 0.3x0.1y3.7