{7x-y=25 y=1.5x+0.5
问题描述:
{7x-y=25 y=1.5x+0.5
答
7x-y=25 y=1.5x+0.5
7x-(1.5x+0.5)=25
5.5x=25.5
x=4.63(63的循环)