初二数学二元一次方程组专项练习题 31.docx

1、初二数学二元一次方程组专项练习题 31 2a5b18 5x y16 a7b3 6x3y2 3x2y 161 8m5b28 8y5x 161 -1m2b22 4a b15 3x8y-8 5a7b4 4x8y1 6x4y 121 0.3x0.4y3.8 8y9x 121 0.3x0.7y1.4 a4b13 3x6y18 a5b14 2x y5 2x2y 20 5m9b11 3y6x 20 -2m4b16 7a5b13 8x4y9 6a8b8 4x7y3 6x6y 178 0.1x0.4y3.9 4y4x 178 0.4x0.4y0.6 4a5b8 x9y19 3a b1 6x2y9 9x6y 1

2、3m5b2 5y6x 1 -8m9b10 4a5b18 9x6y9 5a3b2 5x2y-2 7x8y 118 0.2x0.5y0.2 2y2x 118 0.5x0.1y0.4 6a4b13 4x5y11 4a9b20 3x6y13 3x2y 125 5m6b30 7y7x 125 -2m b28 9a5b18 4x6y4 a3b4 4x9y-1 8x9y 184 0.4x0.2y1 2y7x 184 0.7x0.5y1.8 7a3b1 4x3y9 3a8b11 8x7y7 5x9y 157 3m9b4 y4x 157 -2m2b21 8a9b5 5x3y2 a7b2 3x8y-9 2x7y

3、104 0.4x0.6y3.1 5y7x 104 0.2x0.7y2.4 2a9b9 3x2y18 2a4b12 2x9y19 x y -8 3m6b29 8y5x -8 -5m8b17 3a4b17 9x8y8 4a7b5 9x4y10 5x6y 59 0.3x0.5y0.8 y x 59 0.5x0.9y0.6 8a4b19 2x5y5 8a9b2 2x y18 8x7y 127 m2b13 y2x 127 -5m6b21 3a8b13 x9y6 a3b12 9x6y6 x5y 113 0.9x0.4y4 4y6x 113 0.7x0.8y3.6 7a7b2 x3y11 a8b16 6x y5 6x2y 104 8m8b12 9y7x 104 -1m b23 4a9b2 2x4y3 2a7b9 9x9y-6 2x2y 184 0.1x0.2y2 6y x 184 0.1x0.1y0.7 3a b3 x8y19 7a2b2 x2y12 7x9y 85 8m5b8 9y9x 85 -7m8b13 4a7b15 6x5y3 2a5b8 2x5y-4 2x5y 78 0.7x0.5y3.8 5y3x 78 0.6x0.6y3.2