北师大版八年级数学下册解二元一次方程组练习题精选 86.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 86 4a8b18 6x9y17 9a4b10 5x6y7 4x2y 72 6m3b4 4y2x 72 -6m2b15 6a4b15 8x8y4 2a8b8 2x8y-7 x y 41 0.2x0.4y0.5 2y8x 41 0.1x0.9y1.5 7a5b6 6x7y17 a3b11 2x3y4 3x3y 153 m7b18 3y2x 153 -3m4b8 2a3b7 3x9y-9 8a9b18 9x8y9 8x5y 62 0.4x0.1y1 5y4x 62 0.3x0.7y2.5 7a4b4 2x2y19 6a b5 8x5y7 2x8y

2、0 5m2b17 5y6x 0 -5m2b29 8a2b10 5x y-3 6a3b6 7x y7 4x y 87 0.3x0.4y1.1 3y4x 87 0.7x0.7y2.6 8a5b10 5x7y3 6a9b9 9x y12 2x y 40 3m5b2 2y7x 40 -7m8b17 9a5b6 2x3y6 9a5b6 4x5y4 6x8y 62 0.8x0.9y0.1 5y5x 62 0.2x0.7y3 8a5b7 3x6y1 4a9b6 9x4y17 x3y 95 m8b25 6y4x 95 -10m3b2 9a b5 3x2y4 5a3b16 x8y-4 x7y 123 0.7x0

3、.3y0.8 6y2x 123 0.9x0.2y1.5 7a4b12 7x5y7 a2b1 3x7y14 2x2y 143 6m b1 7y7x 143 -5m8b12 6a2b13 4x4y8 6a2b1 4x5y-10 9x6y 110 0.1x0.2y0.7 9y8x 110 0.3x0.3y1.7 6a2b8 7x8y13 a2b19 3x4y6 x2y 5 m2b13 5y6x 5 -6m6b11 2a b17 2x4y1 5a5b15 9x2y-6 6x4y 106 0.9x0.9y2.5 6y2x 106 0.6x0.6y0.7 2a4b15 2x3y4 3a9b11 x8y18 4x8y 29 9m2b22 5y x 29 -10m b14 8a8b6 9x5y8 3a7b6 x3y-8 7x7y 147 0.9x0.7y1.4 7y5x 147 0.2x0.6y2.3 9a7b14 3x6y13 3a8b10 6x3y10 6x y -10 m3b21 5y4x -10 -7m4b20 7a5b9 2x6y2 2a3b16 9x2y-6 x5y 49 0.8x0.4y3.3 2y3x 49 0.1x0.6y3.5