北师大版八年级数学下册解二元一次方程组练习题精选 54.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 54 7a5b5 5x4y9 2a7b18 5x3y11 9x y 80 6m3b15 y3x 80 -1m5b18 a4b15 7x3y-2 6a5b9 6x4y7 8x9y 177 0.9x0.6y2.3 8y5x 177 0.2x0.5y3.4 2a6b14 9x2y2 4a5b13 4x6y7 4x9y 43 4m2b11 2y8x 43 -2m b3 4a b18 9x8y-4 5a9b5 9x3y-9 x5y 52 0.8x0.7y0.9 2y7x 52 0.6x0.8y2.8 4a4b5 2x3y4 5a3b3 6x8y19 x3

2、y 18 2m9b25 7y7x 18 -5m5b14 a5b5 4x y4 9a b12 7x7y-9 5x6y 75 0.6x0.5y3.8 8y9x 75 0.8x0.6y2.9 5a2b8 6x5y7 5a6b10 2x7y9 9x y 13 4m4b7 7y8x 13 -1m4b0 5a8b2 4x9y-8 a5b1 7x4y4 3x2y 73 0.8x0.6y1 5y4x 73 0.4x0.6y2.9 3a5b3 6x y2 2a4b14 3x8y16 7x5y 163 3m3b6 7y x 163 -7m2b24 9a7b9 7x7y-4 7a2b2 4x6y4 2x9y 14

3、0.3x0.6y2.9 2y5x 14 0.4x0.4y3.9 4a9b5 7x4y12 a8b6 9x6y12 4x9y 153 9m8b18 6y x 153 -8m8b8 3a8b10 4x y-2 a9b14 2x y2 2x6y 138 0.2x0.7y2.5 3y6x 138 0.5x0.1y0.6 4a b4 8x5y3 9a5b14 7x8y7 4x3y 25 2m6b3 5y8x 25 -6m3b16 3a3b13 8x7y-7 9a5b10 5x4y-7 2x8y 183 0.5x0.1y3.5 8y6x 183 0.6x0.1y3.9 a6b19 6x4y7 5a6b19 3x9y5 2x9y 69 8m b19 5y x 69 -10m b30 9a3b1 6x y0 9a2b5 4x9y-6 4x4y 86 0.6x0.2y3 6y7x 86 0.6x0.1y2.6 4a5b10 3x4y4 4a7b12 8x6y10 6x3y 87 3m3b15 7y5x 87 -6m9b7 4a8b11 7x8y2 7a8b12 7x y-9 x6y 194 0.5x0.9y0.1 4y6x 194 0.8x0.7y3.7