初中数学解二元一次方程组专项练习题 71.docx

1、初中数学解二元一次方程组专项练习题 71 5a b3 2x6y18 8a9b14 9x7y6 8x2y 23 2m4b14 4y8x 23 -4m4b21 8a7b9 4x9y3 8a7b7 5x6y8 5x6y 94 0.5x0.4y1.8 8y3x 94 0.8x0.9y1 4a4b16 8x9y2 4a7b20 7x7y13 7x2y 117 3m3b1 4y x 117 -3m3b2 8a9b20 7x7y9 2a8b19 8x4y-2 3x5y 79 0.6x0.7y3.1 2y2x 79 0.3x0.2y2.5 7a6b1 4x4y17 a3b9 2x3y7 6x9y 198 6m

2、2b19 3y3x 198 -6m7b19 a5b18 8x5y10 a9b9 3x3y-10 9x8y 46 0.9x0.2y0.5 4y5x 46 0.6x0.3y3.8 4a8b15 6x7y4 3a3b15 x3y3 7x8y -4 m9b0 5y3x -4 -8m2b6 9a4b3 7x2y-5 2a8b14 3x6y-5 9x6y 144 0.1x0.8y3.3 8y5x 144 0.5x0.3y0.9 3a6b6 4x4y19 7a7b3 5x2y5 8x9y 45 8m9b26 3y x 45 -10m6b4 8a4b9 9x6y3 3a4b19 x4y10 4x5y 194

3、0.3x0.8y4 7y7x 194 0.8x0.2y2.4 2a3b13 x y18 8a5b9 3x5y12 3x y 48 6m2b20 6y7x 48 -9m5b25 7a5b2 9x9y7 a5b7 2x3y10 9x8y 178 0.7x0.9y2.8 4y2x 178 0.8x0.8y1.3 4a3b19 x2y18 6a6b13 2x3y7 9x2y 91 7m9b8 7y7x 91 -8m7b15 7a5b3 5x y-3 7a9b17 4x3y10 4x7y -10 0.3x0.2y0.6 3y x -10 0.7x0.1y1.2 a3b7 3x7y2 6a b6 6x7y5 6x5y 36 3m3b16 9y9x 36 -8m4b20 8a4b10 3x2y-8 7a7b12 2x6y-10 4x2y 103 0.5x0.7y2.7 6y6x 103 0.9x0.4y1.6 5a2b1 2x4y8 8a6b14 5x9y14 9x9y 104 7m7b19 3y2x 104 -6m b12 3a6b15 4x6y8 3a6b2 6x7y-2 7x8y 122 0.3x0.7y1.3 9y9x 122 0.6x0.9y0.3