初中数学解二元一次方程组专项练习题 76.docx

1、初中数学解二元一次方程组专项练习题 76 5a5b2 2x y20 a3b18 6x8y12 2x6y 169 6m2b30 5y7x 169 -1m3b4 3a5b5 9x5y0 6a9b7 2x6y-9 2x7y 91 0.4x0.9y1.2 4y9x 91 0.6x0.5y1.1 4a b14 2x5y19 2a4b9 6x7y11 6x y 140 5m4b28 4y x 140 -2m8b24 4a2b5 x3y10 4a9b15 9x7y-3 3x4y 67 0.4x0.2y2.5 7y9x 67 0.1x0.2y1.1 4a3b9 6x y14 3a6b1 6x4y14 3x5y

2、 11 8m9b25 7y4x 11 -9m9b30 5a b14 4x7y9 4a5b16 2x y-5 3x2y 118 0.3x0.3y3.7 9y3x 118 0.1x0.4y0.9 a6b20 7x8y5 2a3b9 7x8y20 2x5y 152 m9b21 7y7x 152 -7m4b25 3a9b1 3x7y-7 8a9b5 3x8y-2 3x9y 79 0.8x0.1y1 4y9x 79 0.7x0.2y3.1 4a9b11 4x2y2 2a3b10 8x2y8 7x4y 161 7m3b16 7y7x 161 -4m5b0 5a5b8 6x4y-1 6a2b5 2x7y-9

3、 7x y 168 0.4x0.9y2.5 3y7x 168 0.3x0.5y3.5 a4b5 7x8y14 a3b6 4x5y14 9x6y 49 7m7b29 2y6x 49 -7m7b1 9a3b11 7x y-7 5a2b17 x7y-3 3x9y 25 0.6x0.7y3.5 5y5x 25 0.4x0.3y1.5 9a2b14 9x2y5 7a5b9 3x9y8 5x7y 84 m5b0 5y4x 84 -2m3b29 2a3b5 5x6y-5 4a7b18 5x y1 2x5y 160 0.8x0.4y1.5 8y8x 160 0.5x0.7y1.8 7a3b19 2x7y2 9a9b2 7x y15 2x3y 120 5m7b17 8y2x 120 -2m9b17 3a4b16 x8y6 9a8b19 5x8y9 9x7y 106 0.7x0.7y2.3 5y5x 106 0.6x0.3y3.5 6a9b3 7x y7 a7b1 2x2y2 7x5y 130 m3b21 9y4x 130 -8m7b22 6a5b15 6x8y-9 a5b19 7x6y-5 9x6y 81 0.3x0.8y0.7 4y7x 81 0.7x0.4y1.4