方程组5x-y=7 x-5y=3解法
问题描述:
方程组5x-y=7 x-5y=3解法
答
5x - y = 7 (1)
x - 5y = 3 (2)
(1) × 5 - (2),得
24x = 32
x = 4/3
y = - 1/3