(3.6÷0.75x)-(3.6÷x)=1/5
问题描述:
(3.6÷0.75x)-(3.6÷x)=1/5
答
3.6/x * (1/0.75 - 1) = 1/5
3.6/x * (1/3) = 1/5
1.2/x = 1/5
x = 5*1.2 = 6