初二数学二元一次方程组专项练习题 123.docx

1、初二数学二元一次方程组专项练习题 123 4a4b13 4x y2 9a b4 3x7y19 8x2y 78 7m8b10 8y5x 78 -3m3b27 9a5b9 6x3y-9 4a b8 7x7y10 7x7y 79 0.9x0.4y2.7 2y7x 79 0.9x0.5y1.8 a4b13 5x6y10 8a5b9 5x5y1 x8y 183 3m9b27 y x 183 -10m5b0 5a7b15 x7y0 8a8b15 4x8y-7 7x7y 132 0.2x0.6y2.4 7y2x 132 0.2x0.2y2.1 2a2b16 6x9y12 6a2b6 7x9y5 2x5y 1

2、40 3m9b23 9y x 140 -1m2b17 3a3b1 5x3y9 8a9b11 6x2y-7 8x6y 105 0.8x0.7y2.4 4y5x 105 0.3x0.6y1 a6b1 7x2y17 9a5b19 9x5y1 6x8y 72 5m2b12 4y7x 72 -9m9b3 3a b9 2x8y-3 7a7b8 7x4y-5 3x2y 186 0.6x0.3y1.4 5y x 186 0.1x0.7y3.1 6a3b18 6x7y15 2a6b11 2x6y9 x9y 115 5m5b19 y7x 115 -5m3b24 4a8b18 3x9y-3 5a2b12 2x6y-

3、10 5x y 122 0.7x0.9y1.6 4y6x 122 0.8x0.4y0.1 a8b13 7x4y15 4a9b7 x5y14 7x2y 69 6m2b9 6y7x 69 -7m3b10 a8b20 8x5y-6 6a9b5 x y5 8x4y 19 0.7x0.6y1.9 8y6x 19 0.3x0.8y1 3a b3 7x7y7 3a5b2 5x5y16 2x4y 177 3m8b6 6y7x 177 -9m5b28 8a7b3 4x7y8 a5b3 3x3y3 x9y 94 0.3x0.9y1.1 8y6x 94 0.2x0.2y4 6a3b5 2x5y6 2a8b14 2x9y15 9x4y 38 m9b28 2y6x 38 -7m2b9 2a7b4 x3y-5 6a9b2 x9y-2 7x2y 179 0.2x0.5y1.8 4y6x 179 0.9x0.8y1.6 6a b2 5x y7 a7b2 2x7y11 9x2y 48 2m8b3 8y7x 48 -1m4b17 2a b8 3x4y-3 a7b13 6x y-8 9x9y -1 0.6x0.4y0.2 2y2x -1 0.2x0.6y2.1