初二数学二元一次方程组专项练习题 20.docx

1、初二数学二元一次方程组专项练习题 20 a9b19 8x8y10 9a6b17 8x4y10 8x4y 163 4m4b11 4y9x 163 -5m6b0 a b7 x2y0 7a9b5 5x3y2 2x6y 75 0.5x0.9y2.2 5y5x 75 0.1x0.7y3.8 8a4b8 9x9y12 6a8b4 3x6y6 9x4y 164 8m5b6 7y7x 164 -10m3b11 a b11 8x2y-5 4a8b14 7x5y-3 9x3y 111 0.9x0.1y2.8 9y x 111 0.3x0.5y3.5 6a9b20 2x6y15 4a2b9 3x3y10 x7y 7

2、3 8m9b17 7y x 73 -3m3b26 8a3b11 x8y-10 6a4b19 6x8y3 5x8y 142 0.5x0.2y0.3 9y7x 142 0.2x0.6y0.4 7a6b9 9x8y9 2a2b1 2x4y6 5x7y 29 m b11 9y3x 29 -10m b22 5a4b5 6x3y5 6a8b19 3x2y5 2x3y 162 0.1x0.6y3.2 2y8x 162 0.7x0.4y1.2 a6b1 7x5y15 2a2b18 2x5y8 4x8y 169 8m4b23 5y5x 169 -2m4b27 6a b17 8x y3 8a b4 7x3y10

3、7x y 57 0.7x0.8y1.3 8y x 57 0.1x0.9y2.4 7a9b7 8x8y12 a7b2 5x y17 4x6y 120 9m2b4 8y8x 120 -2m9b27 a2b17 8x9y5 5a5b18 3x8y-4 9x y 127 0.9x0.8y3.2 6y9x 127 0.4x0.8y3.9 5a4b5 9x2y8 2a9b17 7x4y3 2x9y 98 8m5b12 5y x 98 -7m b24 6a9b9 7x4y8 a4b16 2x8y7 3x y 175 0.9x0.5y0.8 8y2x 175 0.6x0.2y1.1 5a2b16 4x4y1 8a b1 6x8y9 7x y 1 m4b13 4y x 1 -4m2b28 6a3b11 4x5y8 4a7b17 3x y3 9x7y 80 0.5x0.7y3.6 7y7x 80 0.4x0.7y2.6 a8b9 7x7y1 4a7b17 8x4y13 5x9y 67 3m3b25 3y2x 67 -9m b20 4a5b12 9x6y1 6a3b4 7x6y3 3x4y 43 0.6x0.5y0.9 7y6x 43 0.9x0.8y3.5