初二数学二元一次方程组专项练习题 51.docx

1、初二数学二元一次方程组专项练习题 51 4a b13 3x y5 2a2b17 7x y14 6x5y 191 6m b1 7y x 191 -8m3b4 4a4b9 7x2y-6 8a9b6 5x3y8 x3y 16 0.5x0.6y3.6 6y2x 16 0.9x0.4y0.7 8a b9 2x6y3 8a b5 9x4y16 7x8y 87 3m7b23 8y9x 87 -9m5b30 3a7b13 8x y10 4a9b2 4x4y2 8x y 65 0.4x0.8y1.7 y3x 65 0.7x0.2y1.4 5a6b15 4x2y6 9a2b15 8x8y6 7x8y 85 5m5

2、b10 9y x 85 -4m b11 7a6b3 3x2y-9 3a8b11 5x2y-5 4x7y 122 0.5x0.6y3.2 8y x 122 0.4x0.1y3.3 2a5b20 4x9y10 9a2b7 8x4y4 2x6y 187 4m2b22 3y7x 187 -5m5b26 7a4b20 8x4y-3 6a9b15 3x3y9 5x6y 23 0.2x0.5y0.1 3y3x 23 0.7x0.9y0.1 a2b18 x9y20 6a2b2 8x4y20 9x y 166 9m5b12 7y6x 166 -2m2b10 5a9b4 2x7y10 2a4b19 8x9y-7

3、3x y 162 0.5x0.5y0.2 6y7x 162 0.1x0.3y3.2 3a4b2 5x4y11 2a2b1 4x9y1 3x5y 175 m9b11 7y5x 175 -1m7b22 2a7b17 8x8y2 3a9b11 4x6y-5 5x8y 166 0.5x0.4y3.9 5y6x 166 0.4x0.2y2.9 7a2b9 9x5y8 5a7b7 4x5y15 7x2y 175 7m4b28 8y4x 175 -3m8b15 4a2b20 3x4y10 5a5b5 3x9y-8 5x6y 28 0.4x0.6y2.7 3y8x 28 0.4x0.7y1.2 9a b2 3x3y17 8a b8 8x4y9 x7y 58 3m3b23 6y2x 58 -3m b2 4a7b3 4x4y-7 a7b17 9x3y-5 6x3y 191 0.3x0.9y4 5y9x 191 0.6x0.8y1.1 a4b5 x4y3 6a7b13 3x y8 2x3y -5 m4b7 2y x -5 -1m9b21 2a9b1 3x9y6 6a2b8 7x7y-9 x y 149 0.3x0.4y3.2 2y x 149 0.4x0.8y0.6