已知x/3=y/5=z/4,求x+y+z/y和x+y-z/y-x的值

问题描述:

已知x/3=y/5=z/4,求x+y+z/y和x+y-z/y-x的值

x/3=y/5=z/4=K
X=3K Y=5K Z=4K
x+y+z/y=3K+5K+4K/5K=12/5
x+y-z/y-x=3K+5K-4K/5K-3K=2