已知x⼀2=y⼀3=z⼀4,求x-2y+3z⼀x+y+z的值

2025-03-06 12:33:22
推荐回答(1个)
回答1:

x/2=y/3=z/4=k,x=2k、y=3k、z=4k
(x-2y+3z)/(x+y+z)=(2k-6k+12k)/(2k+3k+4k)=8/9