(45-X)/(13-X)=0.2如何解
问题描述:
(45-X)/(13-X)=0.2如何解
答
45-x=2.6-0.2x
42.4=0.8x
x=53
(45-X)/(13-X)=0.2如何解
45-x=2.6-0.2x
42.4=0.8x
x=53