问题标题:
(100%-10%)*x+(100%+5%)*(100-x)=103.2.
问题描述:

(100%-10%)*x+(100%+5%)*(100-x)=103.2.

潘卫东回答:
  (100%-10%)*x+(100%+5%)*(100-x)=103.2   解:90%X+105%*(100-X)=103.2   90X+105(100-X)=10320   90X+10500-105X=10320   15X=10500-10320   X=12
查看更多
数学推荐
热门数学推荐