(X+70)+2/5X=770怎么解
问题描述:
(X+70)+2/5X=770怎么解
答
x+2/5x=770-70
x=700/(1+2/5)=500
(X+70)+2/5X=770怎么解
x+2/5x=770-70
x=700/(1+2/5)=500