1、二元一次方程组专项练习题149 9a4b13 7x5y19 5a8b19 8x9y8 5x3y 68 2m2b9 2y x 68 -9m8b10 7a6b5 7x4y3 7a6b6 3x y0 x2y 111 0.7x0.6y3.6 3y9x 111 0.6x0.5y4 a5b6 5x3y18 6a6b1 x9y13 5x7y -8 5m6b18 9y3x -8 -3m5b27 a4b2 7x3y2 9a6b10 x5y-2 3x8y -4 0.3x0.3y1.2 4y9x -4 0.8x0.2y0.2 7a7b20 5x6y11 5a6b10 8x2y18 2x9y 194 7m9b24 2
2、y5x 194 -5m9b14 6a6b12 8x6y-9 7a9b20 6x3y5 3x9y 162 0.1x0.3y1.1 3y x 162 0.1x0.2y3.3 a2b17 4x6y10 a6b18 7x y16 4x2y 164 m b12 y9x 164 -7m7b0 2a7b4 4x2y-3 3a3b9 9x2y-1 9x9y 132 0.8x0.9y0.5 4y7x 132 0.2x0.2y3.6 5a4b6 6x3y16 8a6b7 4x4y7 8x2y 165 3m2b21 7y8x 165 -5m9b2 7a3b2 6x7y0 7a5b16 8x7y2 6x2y 95 0
3、.6x0.9y0.8 5y2x 95 0.2x0.6y3.5 2a6b18 6x4y10 7a4b15 x3y14 x3y 30 8m b5 y4x 30 -3m2b16 8a b15 4x5y6 a6b3 7x8y9 7x3y 111 0.1x0.3y3.2 4y4x 111 0.2x0.6y2.7 7a9b14 x2y2 4a6b10 8x5y11 8x9y 199 m5b23 y9x 199 -4m7b9 6a6b2 4x8y-2 8a5b12 4x5y9 5x3y 123 0.8x0.6y0.1 9y6x 123 0.4x0.9y2.6 8a b7 9x4y9 4a5b2 4x8y3
4、3x5y 172 9m b15 7y7x 172 -9m8b24 4a7b13 9x6y0 6a8b1 4x7y3 3x5y 53 0.3x0.9y3.5 8y5x 53 0.1x0.9y2.1 7a6b9 x3y1 6a9b9 2x4y20 5x y 43 5m6b15 7y5x 43 -6m3b9 2a9b2 4x3y6 9a5b16 x2y7 7x4y 171 0.9x0.1y2.1 3y3x 171 0.4x0.1y1.4 4a4b13 4x3y14 2a5b6 3x y19 2x3y 83 4m3b9 8y8x 83 -10m8b17 2a7b6 7x y-10 a b14 6x5y
5、1 9x5y 183 0.3x0.6y3.8 7y8x 183 0.7x0.6y0.7 9a8b20 6x2y5 6a8b7 8x4y10 8x5y -6 4m6b9 y5x -6 -2m4b15 5a2b17 2x5y-7 9a7b2 3x y6 5x7y 187 0.9x0.2y0.6 4y5x 187 0.9x0.7y4 3a3b15 3x8y11 2a5b4 4x5y18 7x3y 190 7m3b6 3y5x 190 -8m9b9 8a8b11 4x y7 8a2b19 4x3y2 9x8y 138 0.7x0.4y2.8 3y8x 138 0.2x0.7y0.8 2a9b5 6x
6、y13 5a3b17 3x9y16 7x4y 5 4m7b2 3y6x 5 -8m4b6 2a b3 7x5y-8 7a5b3 9x7y2 6x5y 7 0.7x0.4y2 7y3x 7 0.7x0.3y2.4 5a3b19 5x8y10 3a3b1 8x7y9 3x y 131 4m b16 4y9x 131 -5m9b0 7a3b17 2x8y10 4a8b15 6x y-4 5x y 157 0.9x0.1y3.6 6y3x 157 0.3x0.1y1.3 3a5b4 6x5y4 8a b11 7x3y11 9x5y 53 3m8b24 y2x 53 -7m9b19 7a8b12 6x3y-3 8a9b1 4x y1 9x6y 147 0.1x0.8y1.3 7y8x 147 0.7x0.6y1.9
