初中数学解二元一次方程组专项练习题 40.docx

1、初中数学解二元一次方程组专项练习题 40 9a b9 7x8y10 9a6b5 x9y10 6x5y 177 m b17 y9x 177 -4m7b18 9a4b4 7x y-3 4a8b19 8x6y9 7x7y 64 0.3x0.3y0.3 6y8x 64 0.4x0.8y3.7 3a3b4 6x6y14 7a5b2 8x8y1 8x y 18 3m7b7 3y8x 18 -8m b20 2a7b2 7x5y9 4a5b18 2x8y-1 3x8y 47 0.2x0.3y1.4 5y5x 47 0.8x0.1y3.9 2a8b12 4x4y4 5a8b14 8x6y10 6x5y 19 4

2、m8b20 y5x 19 -10m2b1 8a b8 5x9y0 6a7b15 8x9y10 8x3y 24 0.4x0.5y0.2 3y6x 24 0.1x0.5y1 5a9b20 8x7y11 3a3b13 7x2y10 6x8y 79 9m5b18 5y x 79 -8m7b26 5a3b13 8x3y-9 4a4b19 7x7y1 8x5y 49 0.5x0.8y3.6 6y3x 49 0.2x0.7y1.3 9a b18 2x2y17 a9b18 8x9y20 7x3y 9 7m7b20 3y2x 9 -4m6b11 3a6b8 8x9y-8 3a4b1 6x4y-4 5x3y 18

3、1 0.6x0.9y3 4y4x 181 0.8x0.6y2.8 4a5b9 5x2y3 8a8b16 x3y10 4x8y 200 3m3b21 9y3x 200 -10m6b6 a8b3 9x9y-1 3a3b20 6x3y-5 3x5y 136 0.2x0.1y0.5 3y7x 136 0.9x0.6y2.8 5a4b9 6x5y19 a2b10 4x3y9 6x9y 98 2m4b17 9y3x 98 -8m7b14 2a5b10 3x3y-10 7a b2 6x4y0 x2y 50 0.5x0.2y1.5 9y8x 50 0.4x0.4y0.4 6a5b9 7x4y4 a4b10 x3y9 2x3y 193 5m4b29 y4x 193 -3m5b14 a5b1 5x9y-10 a7b2 3x3y-1 9x3y 80 0.9x0.3y2.2 8y x 80 0.5x0.1y0.9 3a b20 x7y15 2a b9 x6y1 4x3y 200 9m6b5 5y3x 200 -2m b16 5a2b11 6x y-5 8a2b15 5x4y-3 3x4y 194 0.5x0.5y1.9 7y8x 194 0.3x0.4y2.1