Question

z/x=3/(y- z)=5/(z+x),求(5x-y)/(y+2z)的值

Answer 1

设2/x=3/(y-z)=5/(z+x)=1/k

则x=2k,y=6k,z=3k

(5x-y)/(y+2z)=(4k)/(12k)=1/3

所以(5x-y)/(y+2z)的值为1/3.

（老兄,你打错一个字,可花了好多时间哦）