3.6/[(x/4.5)*(1-1/4)]-3.6/(x/4.5 )=0.2

问题描述:

3.6/[(x/4.5)*(1-1/4)]-3.6/(x/4.5 )=0.2

4.8/(x/4.5)-3.6/(x/4.5)=0.2
1.2/(x/4.5)=0.2
x/4.5=6
x=6×4.5
x=27