已知x/4=y/5=z/7,则x+y+z/z= _ .
问题描述:
已知
=x 4
=y 5
,则z 7
= ___ .x+y+z z
答
设
=x 4
=y 5
=k,z 7
则x=4k,y=5k,z=7k,
所以,
=x+y+z z
=4k+5k+7k 7k
=16k 7k
.16 7
故答案为:
.16 7