已知36+(40+△)/(1-(1-1/3)*60%)=261,求△的值
问题描述:
已知36+(40+△)/(1-(1-1/3)*60%)=261,求△的值
答
36+(40+△)/(1-(2/3)*0.6)=261
(40+△)/(1-(2/3)*0.6)=225
(40+△)/(1-0.4)=225
40+△=225*0.6
△=335