北师大版八年级数学下册解二元一次方程组练习题精选 30.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 30 8a4b7 5x7y19 2a2b10 x4y14 9x8y 105 5m5b8 3y x 105 -6m5b30 8a b14 x9y6 7a2b17 3x y3 8x2y 16 0.4x0.6y0.1 y9x 16 0.4x0.9y2.8 a5b8 6x4y18 9a3b12 6x9y5 6x y 143 m3b27 9y3x 143 -6m6b10 9a b3 8x9y5 4a3b10 7x y-1 6x7y 150 0.3x0.8y0.3 5y8x 150 0.7x0.8y3.6 7a8b16 6x y3 9a6b12 6x3y6

2、 3x9y 138 m b28 4y9x 138 -10m8b21 4a7b15 2x y7 6a4b19 7x3y-1 6x7y 87 0.1x0.8y2.9 y x 87 0.9x0.2y1.9 6a9b10 6x4y9 8a2b11 7x7y10 7x4y 88 8m b26 8y2x 88 -8m2b30 5a9b8 5x y2 9a8b5 3x y-7 2x6y 193 0.7x0.6y2.7 7y9x 193 0.6x0.4y3.2 8a5b2 2x y7 2a9b1 x5y19 9x y 170 9m4b3 6y3x 170 -2m9b5 7a4b9 9x3y6 2a4b16 3

3、x7y2 7x y 137 0.6x0.7y0.5 6y7x 137 0.7x0.1y2.1 2a3b5 8x3y1 4a8b17 x2y13 9x6y 136 9m5b13 4y3x 136 -8m6b22 8a2b18 3x7y-9 2a9b19 3x4y4 x6y 101 0.8x0.7y1.8 3y3x 101 0.6x0.1y0.1 3a7b5 4x8y14 3a6b14 5x6y17 5x3y 103 8m4b6 y5x 103 -1m8b4 6a5b2 x5y-6 9a6b15 7x5y6 4x5y 169 0.8x0.2y2.1 4y7x 169 0.5x0.8y0.9 2a9b2 5x4y2 4a8b18 7x9y19 8x5y 46 6m7b8 5y x 46 -4m8b27 8a4b1 2x7y-9 7a6b14 x7y-3 6x9y 81 0.1x0.6y0.3 6y3x 81 0.5x0.8y0.1 8a b16 4x3y8 6a8b8 6x9y4 7x9y 57 4m9b19 9y9x 57 -6m6b11 8a9b9 4x3y10 4a3b20 6x8y4 8x5y 25 0.3x0.5y0.2 4y8x 25 0.8x0.8y3.1