x:y:z=2:3:4,求x-y+3z分之x+2y-z的值

2025-06-23 07:39:03
推荐回答(1个)
回答1:

直接代入x=2,y=3,z=4,
(x+2y-z)/(x-y+3z)=(2+6-4)/(2-3+12)=4/11