{x+y/2+x-y/3=1,3(x+y)/2+x-y/3=17
问题描述:
{x+y/2+x-y/3=1,3(x+y)/2+x-y/3=17
答
两式相加
2(x+y)=1+17
x+y=9
y=9-x
x+y/2+x-y/3=1 两边乘6
3x+3y+2x-2y=6
5x+y=6
5x+9-x=6
4x=-3
x=-3/4
y=9+3/4=39/4
如果本题有什么不明白可以追问,