二元一次方程组专项练习题80.docx

1、 二元一次方程组专项练习题二元一次方程组专项练习题 80 4a3b13 4x6y13 9a2b3 2x4y1 8x7y 80 8m4b15 8y x 80 -6m9b10 8a4b15 4x9y6 5a b9 5x9y6 8x7y 28 0.3x0.8y2.1 y4x 28 0.1x0.3y0.7 a b6 5x2y18 3a8b14 5x5y12 5x9y 187 6m6b24 2y9x 187 -5m4b23 8a b5 2x6y8 9a5b2 9x4y3 5x9y 180 0.8x0.5y2 y4x 180 0.9x0.2y0.9 5a6b13 8x9y8 6a3b18 3x4y8 7x

2、3y 10 3m3b6 2y9x 10 -4m8b9 8a2b8 3x y-5 6a8b10 9x2y-4 2x5y 103 0.2x0.6y4 6y6x 103 0.2x0.7y3.4 8a7b9 7x4y14 9a4b4 4x6y5 6x y 111 4m2b8 6y9x 111 -8m b2 2a7b4 x6y10 9a8b8 2x9y-9 x2y 110 0.6x0.4y0.8 3y5x 110 0.2x0.9y0.3 5a5b11 6x8y10 a9b1 7x2y12 3x3y 89 m2b3 2y7x 89 -1m9b26 2a6b11 3x7y-3 7a2b9 8x4y1 5x5

3、y 21 0.5x0.9y0.2 2y2x 21 0.8x0.3y1.5 7a9b10 6x7y6 a9b11 3x2y1 3x4y 84 m2b21 y2x 84 -10m3b0 8a2b14 9x2y-7 4a b18 9x6y-2 8x4y 1 0.2x0.2y3.5 9y7x 1 0.5x0.2y1.3 4a2b8 4x4y6 2a2b1 9x3y6 9x7y 8 7m4b1 2y2x 8 -2m b26 5a9b9 3x6y-5 3a b11 7x5y7 7x y 47 0.6x0.2y1.1 9y3x 47 0.4x0.7y2.6 2a3b18 3x5y17 2a7b6 4x9y1

4、2 8x y 63 8m2b19 4y4x 63 -3m7b10 8a6b6 8x3y-9 3a2b17 x5y-7 5x5y 31 0.3x0.1y3.5 2y9x 31 0.5x0.5y1.7 3a5b12 2x6y1 a3b12 7x4y8 6x2y 15 2m b5 6y4x 15 -10m b6 6a7b16 9x2y-1 8a3b9 8x9y6 4x2y 116 0.4x0.2y0.5 y5x 116 0.2x0.4y0.6 4a b2 x2y11 9a5b2 7x8y17 5x7y 4 7m b2 2y8x 4 -10m2b8 2a6b3 6x8y3 4a2b10 9x2y-5

5、5x3y 10 0.3x0.2y0.5 2y4x 10 0.4x0.6y0.6 3a b19 9x y7 a4b11 8x4y11 6x4y 68 4m b15 2y5x 68 -3m5b4 5a5b9 7x2y-6 9a6b15 6x3y6 6x y 143 0.2x0.3y3.7 6y7x 143 0.5x0.9y0.3 4a9b13 5x9y12 5a5b5 7x9y12 5x6y 42 9m9b0 y4x 42 -3m4b24 9a b9 8x9y-1 5a4b4 5x3y-6 8x6y 5 0.8x0.5y2.3 6y x 5 0.1x0.3y3.5 4a7b5 4x9y3 5a5b

6、9 3x5y18 8x8y 45 2m8b30 5y5x 45 -4m9b30 a b20 3x8y-6 5a2b3 9x6y8 5x9y 77 0.1x0.1y0.8 3y4x 77 0.6x0.2y1.1 3a4b8 9x5y17 5a6b1 5x8y12 9x3y 17 5m4b8 y9x 17 -3m b8 a3b20 7x9y4 a2b3 8x5y-1 8x6y 47 0.9x0.9y1.7 2y9x 47 0.6x0.5y3 2a3b11 9x4y2 4a7b4 3x4y19 3x8y 71 4m b25 9y4x 71 -9m2b22 6a4b6 2x4y9 5a4b7 9x7y3 6x4y 10 0.7x0.8y2.2 2y6x 10 0.3x0.1y3.2