已知x/3=y/4=z/5,则(x+4y+2z)/(8x+y+6z)=

问题描述:

已知x/3=y/4=z/5,则(x+4y+2z)/(8x+y+6z)=

令x/3=y/4=z/5=t
x=3t y=4t z=5t
(x+4y+2z)/(8x+y+6z)
= (3t+16t+10t)/(24t+4t+30t)
=29t/58t
=1/2令x/3=y/4=z/5=tt系咩意思啊三个数相等,令他们都等于tx/3=tt/4=tz/5=t为什么一定要等于t呢因为只知道三个数相等,不知道等于多少,就令他们等于一个字母t