北师大版八年级数学下册解二元一次方程组练习题精选 20Word文档格式.docx

1、 9a b8 2x6y-8 2a4b11 9x4y5 2x5y 50 0.1x0.8y2.6 2y4x 50 0.6x0.5y0.5 6a6b1 9x4y9 5a5b11 2x2y3 3x8y 111 9m2b9 5y x 111 -9m9b15 8a6b2 2x y-8 5a4b8 x5y-7 8x5y 49 0.5x0.5y0.9 3y6x 49 0.7x0.8y0.1 3a9b1 8x y16 3a7b15 6x9y6 4x7y 163 9m b5 3y4x 163 -3m9b15 8a b11 6x7y0 a6b15 6x4y2 3x6y 32 0.3x0.8y1.8 8y9x 32

2、0.3x0.9y3.3 8a6b6 2x y5 8a7b6 7x3y11 7x4y 197 7m6b29 8y8x 197 -6m7b21 8a3b20 x7y6 4a b3 3x2y-8 9x7y 11 0.1x0.8y3.4 3y9x 11 0.5x0.9y2.3 3a b15 8x6y10 8a2b10 3x y10 5x8y 195 2m b5 9y2x 195 -1m4b11 a5b18 2x3y-6 6a6b17 9x5y-9 4x3y 28 0.6x0.9y2.5 5y9x 28 0.4x0.9y2.9 9a2b17 9x3y3 2a2b2 9x y12 8x2y 118 6m4

3、b8 8y2x 118 -5m9b23 6a2b6 5x8y-1 2a b12 6x2y-2 5x9y 129 0.9x0.8y3.2 y2x 129 0.1x0.5y3 a4b4 2x3y11 9a5b5 3x4y10 9x5y 155 5m7b18 6y x 155 -10m5b15 5a9b6 3x9y-9 4a7b13 9x7y7 8x4y 194 0.3x0.3y1.2 5y x 194 0.1x0.6y3.1 8a8b18 7x y16 9a4b17 4x8y15 8x7y 30 6m b28 3y5x 30 -7m7b5 a3b13 6x9y-10 8a6b14 5x7y8 7x9y 108 0.7x0.2y2.2 9y8x 108 0.7x0.6y0.6 6a6b11 9x3y7 2a5b18 6x4y15 5x5y 30 3m5b18 y5x 30 -5m2b17 9a b17 x3y9 8a6b9 7x8y-9 9x2y 170 0.7x0.1y1.1 6y x 170 0.8x0.3y1.1