北师大版八年级数学下册解二元一次方程组练习题精选 91.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 91 4a5b19 2x9y20 5a3b1 9x3y14 5x y 57 8m9b15 9y2x 57 -1m3b4 9a5b19 7x7y-10 7a5b2 9x2y-5 x8y 11 0.2x0.7y0.4 8y5x 11 0.3x0.6y3.5 8a9b20 6x y7 4a6b17 2x y5 9x6y 51 m7b6 2y2x 51 -10m3b15 8a4b13 5x6y-6 8a7b13 9x7y6 5x4y 89 0.9x0.1y2.3 3y3x 89 0.4x0.4y1.2 3a4b19 4x6y14 2a9b2 3x7y1

2、9 9x6y 97 9m8b27 9y5x 97 -8m3b29 7a5b13 4x9y4 9a2b18 7x y1 8x7y 114 0.4x0.4y0.4 2y7x 114 0.6x0.6y1.4 5a5b3 x y2 6a8b12 9x5y8 9x9y 39 9m3b10 9y3x 39 -1m b25 9a5b12 7x y4 2a3b2 4x3y3 9x3y 148 0.8x0.4y4 7y x 148 0.7x0.4y0.4 5a2b9 6x7y20 4a3b13 x5y2 9x4y 108 8m6b24 9y7x 108 -3m9b30 7a9b16 8x4y-6 4a2b4 3

3、x y10 5x7y 118 0.5x0.1y1.3 5y9x 118 0.2x0.9y3.9 6a8b5 2x4y3 6a9b4 4x4y19 7x3y 66 8m2b30 6y9x 66 -2m3b28 5a b5 2x8y-1 4a5b6 x5y5 9x8y 175 0.4x0.8y3.1 2y6x 175 0.2x0.4y1.4 3a3b2 8x2y16 a7b2 6x2y10 3x y 21 m8b26 5y2x 21 -1m3b23 7a3b5 5x y-7 5a7b9 8x9y-5 4x9y 35 0.9x0.1y2.7 9y7x 35 0.6x0.9y3.6 7a8b3 7x8y12 a b4 2x4y14 2x5y 40 m9b26 2y9x 40 -3m6b22 a3b9 x4y9 6a6b13 9x6y0 5x6y 196 0.3x0.2y2.1 5y2x 196 0.4x0.7y3.2 a3b5 4x y15 a8b14 9x8y6 8x6y 181 8m5b15 7y9x 181 -2m9b9 9a2b11 3x7y8 a7b19 9x8y-7 7x3y 170 0.5x0.8y3.8 8y4x 170 0.5x0.6y2.2