初中数学解二元一次方程组专项练习题 73.docx

1、初中数学解二元一次方程组专项练习题 73 9a b13 9x9y9 a3b5 4x y9 6x y 126 4m2b29 3y x 126 -4m8b15 6a9b15 2x9y-3 9a b8 x9y-8 5x3y 178 0.8x0.3y3.7 3y2x 178 0.1x0.9y3.2 8a7b3 3x4y1 5a3b7 2x5y16 x9y 180 4m6b12 8y7x 180 -8m b21 8a4b9 9x y-9 a2b1 2x5y8 5x2y 9 0.6x0.3y1.5 6y7x 9 0.5x0.6y0.8 7a7b5 2x5y19 4a6b6 4x5y4 5x4y 78 8m

2、2b6 9y6x 78 -8m6b13 5a3b19 2x2y3 7a7b13 5x2y1 7x3y 9 0.3x0.2y3.1 5y9x 9 0.2x0.1y0.7 a3b11 9x4y7 a9b2 8x2y12 2x9y 22 6m9b18 8y2x 22 -10m6b21 6a8b16 9x2y-6 6a6b20 x2y-3 7x5y 87 0.9x0.3y0.6 4y9x 87 0.8x0.5y3.1 3a4b8 6x7y9 8a7b9 8x3y16 2x8y 143 5m3b22 6y4x 143 -5m5b4 3a4b16 9x4y-9 4a7b19 5x6y6 8x y 132

3、0.8x0.5y3.2 3y6x 132 0.1x0.4y0.4 2a8b16 5x y1 8a6b12 4x5y6 6x y 157 2m8b23 8y8x 157 -8m7b15 3a3b10 5x y10 6a4b19 8x8y10 5x5y 190 0.2x0.1y0.8 8y9x 190 0.7x0.5y3.7 9a6b6 4x y1 9a8b20 4x4y18 8x7y 200 7m6b17 9y4x 200 -4m3b28 3a b4 4x y-2 5a6b10 2x4y-3 6x2y 45 0.7x0.4y0.2 7y3x 45 0.7x0.3y1.6 4a8b10 6x6y19 3a4b11 6x3y12 5x3y 158 8m6b15 5y3x 158 -7m8b25 5a8b4 x3y4 3a3b19 2x9y9 8x4y 197 0.6x0.2y2.5 9y4x 197 0.1x0.6y3.3 4a b1 2x5y17 3a5b13 9x8y9 3x6y 66 9m7b11 2y5x 66 -4m b10 8a3b4 7x6y10 2a4b16 5x3y-4 9x y 195 0.9x0.3y1.2 4y5x 195 0.2x0.3y1.8