(X-30)/(X/8+30)=5解题过程

问题描述:

(X-30)/(X/8+30)=5解题过程

(X-30)/(X/8+30)=5
(X-30)=5(X/8+30)
X-30=5X/8+150
X-5X/8=150+30
3x/8=180
x=480