初中数学解二元一次方程组专项练习题 91.docx

1、初中数学解二元一次方程组专项练习题 91 7a7b9 6x4y18 7a3b12 5x8y4 2x y 21 5m6b20 2y9x 21 -5m8b9 a6b15 2x y2 4a6b2 2x2y-2 3x2y 151 0.4x0.5y3.5 5y8x 151 0.4x0.1y1.5 2a6b15 8x4y1 7a4b9 8x y10 5x2y 13 3m2b30 3y8x 13 -7m5b26 2a b10 8x4y-8 7a6b8 x3y1 8x8y 174 0.9x0.1y4 y2x 174 0.2x0.8y3 4a6b3 3x3y9 5a6b4 4x9y3 7x8y 187 5m7b

2、16 6y6x 187 -8m5b8 2a2b9 7x8y2 9a9b1 x2y5 9x y 126 0.7x0.2y2.3 4y3x 126 0.4x0.6y3.1 4a5b5 9x y12 2a9b7 5x6y2 8x8y 159 6m6b17 2y5x 159 -1m b22 4a3b15 2x8y6 9a3b19 7x y-8 6x2y 85 0.3x0.2y2.5 4y5x 85 0.3x0.9y2.2 4a6b4 x7y9 9a8b5 9x7y12 5x y 185 6m b24 5y x 185 -3m4b13 7a2b8 8x8y2 8a b20 4x6y7 3x4y 88 0

3、.3x0.6y0.6 9y6x 88 0.8x0.4y1 8a9b9 2x2y19 4a b11 6x8y19 2x2y 33 2m7b10 5y9x 33 -9m7b8 a9b1 5x8y-2 a b1 x3y0 9x2y 143 0.3x0.4y2.4 8y5x 143 0.7x0.6y1.3 5a7b1 x6y16 9a4b2 7x3y6 x3y 199 9m6b15 2y2x 199 -2m6b15 3a7b15 6x7y3 4a4b15 9x6y-10 9x5y 47 0.2x0.8y3.8 8y7x 47 0.4x0.8y0.2 7a7b9 3x3y12 4a5b16 2x9y20 2x2y 18 7m9b5 6y8x 18 -8m4b22 a b14 8x4y6 2a6b3 7x8y-5 6x8y 99 0.1x0.5y2.9 3y8x 99 0.2x0.7y2.8 2a4b16 2x3y9 9a b7 9x8y1 6x3y 107 3m5b10 y4x 107 -3m5b23 2a6b8 8x5y-7 a6b18 x3y7 7x2y 52 0.8x0.6y0.1 8y9x 52 0.9x0.2y1.9