初二数学二元一次方程组专项练习题 25.docx

1、初二数学二元一次方程组专项练习题 25 6a9b9 4x8y18 4a b18 4x3y4 9x2y 90 2m b17 8y6x 90 -5m2b28 5a7b18 7x3y-2 9a4b4 4x7y-9 9x4y 170 0.1x0.7y2.9 2y3x 170 0.3x0.3y2.7 a7b8 9x7y14 5a3b11 6x y18 2x8y 70 8m b28 8y5x 70 -7m2b22 8a6b3 5x8y0 8a5b10 4x8y-6 5x5y 149 0.1x0.7y2.5 4y3x 149 0.7x0.2y2.7 2a7b18 5x2y5 8a9b1 4x7y18 4x8

2、y 196 7m6b25 4y7x 196 -8m4b27 9a3b6 5x8y-10 5a5b3 3x5y0 5x6y 143 0.7x0.2y3.8 4y4x 143 0.3x0.3y3.1 6a5b19 5x y4 a7b13 x8y11 3x7y 44 m b9 5y3x 44 -3m4b9 6a5b20 8x2y2 9a7b14 2x6y1 5x3y 171 0.4x0.1y1 2y5x 171 0.5x0.4y1.8 9a9b7 7x7y8 8a9b10 6x2y18 8x9y 22 9m6b30 3y5x 22 -6m3b22 8a8b1 5x3y7 4a6b12 3x4y-8

3、5x6y 142 0.2x0.8y1.7 4y8x 142 0.4x0.6y0.9 a7b19 3x y10 a b9 2x5y14 5x5y 26 9m4b30 5y4x 26 -2m8b8 7a2b16 6x y9 5a5b19 3x8y4 9x5y 160 0.3x0.8y1.3 6y6x 160 0.3x0.9y0.8 9a8b6 3x3y7 3a5b9 4x8y4 3x y 107 4m6b8 3y4x 107 -1m8b14 9a8b2 6x4y8 9a7b9 3x6y6 5x7y 88 0.5x0.6y2.3 2y2x 88 0.7x0.4y2.4 3a9b13 6x y5 5a5b11 6x5y19 9x2y 116 6m6b0 2y5x 116 -9m4b10 5a b9 7x9y5 3a5b8 3x7y-7 7x5y 50 0.9x0.2y3.1 2y2x 50 0.9x0.5y2.1 6a b1 6x6y19 5a4b14 5x8y12 8x7y 162 3m9b13 9y3x 162 -7m7b22 2a8b20 x y-8 5a7b3 3x8y-10 2x3y 81 0.9x0.8y1.1 5y8x 81 0.6x0.3y3.2