0.8:3又4分之3=(5-X):0.75

问题描述:

0.8:3又4分之3=(5-X):0.75

0.8:(15/4)=(5-x):0.75
(4/5):(15/4)=(5-x):(3/4)
16/75=4(5-x)/3
4/25=5-x
x=121/25