x/(1/4)+x/(3/7)+x/(3/5)=360,得x=45厘米这个方程怎么解

题目

x/(1/4)+x/(3/7)+x/(3/5)=360,得x=45厘米这个方程怎么解

答案

x/(1/4)+x/(3/7)+x/(3/5)=360
4x+7x/3+5x/3=360
(4+7/3+5/3)x=360
8x=360
x=360/8
x=45