北师大版八年级数学下册解二元一次方程组练习题精选 16.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 16 7a3b14 3x8y20 8a6b15 4x3y20 x2y 19 7m3b28 5y8x 19 -7m2b8 5a3b19 9x5y-6 8a4b12 4x9y-5 2x2y 56 0.1x0.7y1.6 7y9x 56 0.7x0.8y2.8 9a7b6 5x2y3 6a4b13 3x8y13 3x y 144 8m3b30 2y x 144 -2m b0 9a8b20 4x4y-4 6a2b16 7x7y-9 3x2y 75 0.3x0.7y1 4y4x 75 0.7x0.9y3.2 2a9b9 9x8y15 7a5b14 x6y

2、11 7x4y 130 8m3b18 9y3x 130 -8m8b29 a2b5 4x7y8 a5b14 7x9y7 6x6y 62 0.5x0.7y0.2 6y7x 62 0.7x0.1y3.2 6a4b1 7x2y1 a b8 9x2y4 2x8y 123 9m5b28 8y7x 123 -5m2b5 8a3b8 2x y-5 7a6b10 9x y9 9x y 39 0.1x0.8y2.9 4y4x 39 0.9x0.9y0.1 4a5b20 5x8y14 2a b19 4x8y15 9x9y 54 3m4b21 8y3x 54 -10m9b15 2a b17 7x6y2 2a6b12

3、2x2y2 6x6y 153 0.4x0.7y3.7 4y4x 153 0.8x0.8y2 a4b17 6x7y12 3a6b19 5x7y6 7x9y 124 9m5b3 5y5x 124 -9m b0 6a5b17 6x2y-4 3a2b20 5x3y-8 8x3y 38 0.1x0.2y2.5 9y4x 38 0.6x0.9y1.4 3a9b6 7x9y7 5a b3 6x8y8 2x2y -6 2m8b8 3y2x -6 -6m3b5 8a5b1 2x5y-4 a5b3 3x3y3 x3y 37 0.9x0.4y3.8 8y6x 37 0.4x0.6y2.7 9a9b15 5x4y8 5a4b6 2x3y13 5x7y -3 2m6b6 5y7x -3 -3m b24 8a5b8 3x6y-1 a5b20 2x3y-7 8x6y 126 0.1x0.6y0.7 4y5x 126 0.4x0.1y3.2 2a6b10 x8y6 9a2b18 7x5y1 6x2y -9 4m5b12 7y8x -9 -6m b13 a6b5 4x3y-7 5a b1 x7y-9 x6y 157 0.7x0.1y3.8 5y x 157 0.8x0.2y0.8