北师大版八年级数学下册解二元一次方程组练习题精选 7.docx

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 7 5a3b4 6x3y13 4a8b3 4x9y16 x4y 157 7m2b19 y5x 157 -9m9b9 3a4b7 4x7y-9 7a b6 9x2y4 9x6y 161 0.1x0.5y1 5y2x 161 0.6x0.1y3.5 a6b3 3x5y9 a7b5 4x8y19 x5y 130 2m9b7 y4x 130 -9m4b7 4a b19 4x8y-6 9a4b14 x8y-3 x7y 57 0.9x0.5y2.2 3y4x 57 0.8x0.5y1.8 5a4b10 8x6y20 9a8b7 8x y1 x5y 141

2、4m8b6 2y8x 141 -6m4b6 5a5b17 2x3y0 9a8b12 8x7y-10 x3y 55 0.7x0.1y2.9 7y8x 55 0.9x0.4y0.7 6a7b15 7x5y20 5a8b3 x3y16 8x3y 30 6m6b14 9y6x 30 -8m4b2 a3b7 5x y2 5a8b10 7x9y9 4x y 136 0.9x0.7y0.2 y6x 136 0.7x0.3y1.1 8a5b19 9x2y19 3a5b12 4x4y5 x y 43 2m6b5 2y2x 43 -10m5b3 a3b10 x7y-10 6a6b13 3x7y-9 x8y 64

3、0.2x0.6y2.3 6y8x 64 0.1x0.1y0.9 9a2b19 3x3y4 8a9b5 2x9y16 9x5y 177 7m4b28 3y x 177 -1m b16 9a5b15 4x y-1 4a5b17 6x9y6 3x y 182 0.5x0.7y0.5 4y8x 182 0.5x0.4y4 3a8b18 5x3y1 5a9b3 9x2y19 7x y 96 6m5b17 y4x 96 -7m2b9 8a2b12 6x9y6 4a7b3 x4y-4 3x5y 179 0.8x0.6y3 8y x 179 0.9x0.1y2.7 9a9b1 9x8y9 7a4b8 9x6y20 7x4y 102 2m6b28 9y9x 102 -10m5b13 7a5b15 7x9y-8 4a b8 7x3y1 4x4y 69 0.8x0.2y1.4 7y5x 69 0.7x0.1y1.5 8a7b14 9x9y1 5a3b17 6x7y10 6x5y 40 9m9b21 8y5x 40 -1m7b8 6a9b13 x3y-2 a b3 4x8y3 5x8y 154 0.3x0.6y3.3 3y9x 154 0.2x0.6y1.5