初二数学二元一次方程组专项练习题 19.docx

1、初二数学二元一次方程组专项练习题 19 8a2b10 7x9y13 3a9b1 8x2y7 7x9y 47 7m2b9 2y2x 47 -2m3b4 7a2b13 3x6y-7 9a9b2 9x6y-10 6x3y 114 0.7x0.4y1.9 3y x 114 0.4x0.5y3.8 a5b10 5x9y20 3a7b10 8x4y18 2x4y 69 7m8b17 3y5x 69 -1m9b26 4a b18 3x7y1 9a5b2 7x3y9 5x7y 127 0.9x0.3y0.3 6y2x 127 0.1x0.1y0.4 7a2b13 6x6y8 9a2b8 7x5y20 7x7y

2、 94 5m9b20 y x 94 -7m7b22 4a4b8 5x7y4 9a6b14 7x9y-9 2x9y 185 0.5x0.1y3.1 2y5x 185 0.6x0.3y0.7 a2b8 4x8y17 3a6b18 x2y10 6x9y 101 7m4b14 5y7x 101 -10m7b15 5a9b16 9x7y1 8a b16 3x7y-2 4x9y 81 0.7x0.3y3.8 8y4x 81 0.2x0.3y3.4 5a6b11 x2y14 5a3b15 7x4y9 x8y 62 2m3b0 4y6x 62 -7m3b7 a4b1 4x4y0 a4b8 3x2y-10 x4

3、y 154 0.3x0.3y3.6 8y4x 154 0.3x0.7y3.5 7a8b7 5x5y16 4a b20 2x8y18 x8y 186 m9b11 8y x 186 -1m9b14 a5b16 5x8y-5 5a b19 5x4y0 3x3y 133 0.4x0.7y3.1 7y6x 133 0.4x0.1y1.7 a7b14 8x y16 5a8b7 2x6y12 6x5y 187 5m b23 6y5x 187 -5m4b30 9a2b5 7x3y-7 3a5b10 8x2y-1 6x3y 192 0.9x0.9y3 5y4x 192 0.7x0.1y0.2 8a3b7 4x6y13 9a3b3 4x8y5 x9y -2 9m2b9 3y7x -2 -2m b25 2a7b11 6x2y-2 7a4b15 x9y-2 4x7y 147 0.7x0.4y4 6y8x 147 0.3x0.4y3.6 5a2b15 9x4y8 3a8b17 4x2y15 5x4y 53 6m6b25 4y8x 53 -10m5b8 2a b16 4x3y0 4a9b3 3x6y-6 6x9y 81 0.3x0.8y2.9 9y7x 81 0.9x0.8y1.6