已知不等式5a-1>3(a+1)的最小整数解a满足方程组ax+2y=-7 2x+3y=4求(x-y)(x+y)的值

问题描述:

已知不等式5a-1>3(a+1)的最小整数解a满足方程组ax+2y=-7 2x+3y=4求(x-y)(x+y)的值

5a-1>3(a+1) 解得2a>4 a>2
(a-1)/2