初二数学二元一次方程组专项练习题 62.docx

1、初二数学二元一次方程组专项练习题 62 7a8b9 9x9y1 a2b3 x8y4 3x5y 145 3m3b10 y9x 145 -8m4b16 2a4b16 6x9y-3 a8b14 7x6y-8 8x4y 151 0.6x0.9y3.3 7y5x 151 0.6x0.2y0.6 8a8b8 x5y18 a6b15 x6y19 2x y 70 8m2b11 5y2x 70 -7m7b14 2a4b18 x7y-3 6a2b8 2x2y-4 4x9y 83 0.2x0.4y3.2 7y6x 83 0.3x0.7y0.7 4a b5 9x y8 5a9b5 x7y12 6x3y 159 9m7

2、b17 y x 159 -8m8b13 3a7b2 5x5y-7 7a4b13 x7y-6 6x9y 11 0.7x0.2y0.8 9y9x 11 0.6x0.2y2.9 a8b7 3x2y18 5a6b9 2x4y18 7x5y 187 2m9b8 4y4x 187 -10m2b2 8a2b4 9x7y-10 3a2b12 4x8y3 6x2y 18 0.5x0.3y3 8y6x 18 0.2x0.1y3.8 8a b5 8x4y17 8a7b20 x9y15 7x2y 176 9m6b4 6y3x 176 -4m7b3 7a6b7 6x4y-2 7a2b7 8x3y0 4x2y 13 0.

3、5x0.6y0.2 4y7x 13 0.5x0.9y2.2 8a5b1 x6y10 8a8b4 8x3y18 7x3y 127 9m9b5 y x 127 -5m7b2 6a4b17 9x3y-8 3a b20 3x5y5 8x y 17 0.6x0.3y3.1 8y9x 17 0.6x0.9y0.8 4a7b9 6x y11 4a6b12 9x5y17 8x y 189 3m8b21 3y3x 189 -2m4b3 6a7b11 2x8y7 5a5b5 8x5y-10 6x4y 111 0.7x0.1y2 5y9x 111 0.8x0.5y0.6 3a5b15 8x4y11 5a9b9 5x8y19 8x y 79 4m8b0 4y6x 79 -1m8b4 4a4b6 x7y5 3a8b2 2x2y-4 2x6y 147 0.5x0.8y3.4 5y4x 147 0.3x0.7y1.6 9a3b10 9x6y3 7a4b18 x4y6 6x8y 87 7m5b30 9y9x 87 -9m5b0 3a3b15 7x4y-8 4a8b4 9x4y7 4x8y 118 0.7x0.1y1.5 8y5x 118 0.6x0.9y2.2