1、北师大版八年级数学下册解二元一次方程组练习题精选 63 4a3b9 9x4y18 5a8b2 x6y14 8x y 126 m7b24 3y3x 126 -2m9b15 7a6b16 7x3y-7 8a8b14 2x3y8 9x3y 27 0.9x0.9y1.2 8y3x 27 0.2x0.9y1.5 6a3b16 8x8y9 6a8b7 8x y6 3x2y 85 5m4b13 5y6x 85 -4m2b2 6a7b15 8x8y4 7a b11 9x5y-6 9x y 195 0.7x0.4y1.3 9y8x 195 0.5x0.9y3 7a4b9 4x7y12 5a3b11 6x6y10
2、 8x8y 60 4m2b7 4y8x 60 -4m2b14 9a5b9 8x6y-10 2a7b19 9x9y-6 6x2y 142 0.5x0.7y3.6 9y6x 142 0.6x0.2y3.4 6a5b1 9x7y9 9a6b2 7x8y16 7x9y 126 5m6b14 5y7x 126 -6m9b19 7a9b15 7x2y7 a4b20 8x8y-5 9x8y 62 0.5x0.8y3.7 7y8x 62 0.6x0.6y0.4 2a9b18 8x5y9 3a7b2 7x3y17 8x8y 72 3m4b17 5y8x 72 -8m6b27 7a b20 7x6y-7 a b1
3、1 9x9y4 4x7y 47 0.7x0.1y3.6 3y x 47 0.9x0.1y1.8 8a9b13 2x5y7 9a8b3 2x5y5 7x3y 148 3m4b4 8y3x 148 -10m9b18 4a4b6 4x8y-5 a3b4 8x4y-9 x y 90 0.7x0.4y2.4 8y2x 90 0.9x0.7y3 7a9b7 5x7y16 9a2b16 7x8y15 4x4y 80 3m5b22 3y2x 80 -4m b9 a2b5 5x6y2 2a3b18 7x2y-10 4x9y 32 0.9x0.3y2.5 7y7x 32 0.2x0.3y0.2 3a8b18 8x y3 9a b3 8x4y13 2x6y 39 9m4b24 5y5x 39 -7m9b3 9a4b11 8x2y-3 2a5b3 x3y-5 5x y 170 0.7x0.2y0.8 2y5x 170 0.4x0.4y3.4 9a8b10 3x4y19 3a2b13 2x3y4 5x7y 23 8m2b22 8y3x 23 -1m6b22 a6b16 3x3y-4 6a b11 4x8y7 8x y 182 0.3x0.1y1.8 9y9x 182 0.8x0.3y3.8