4分之3X+3*0.8=7.5

问题描述:

4分之3X+3*0.8=7.5

4分之3X+3*0.8=7.5
0.75X+2.4=7.5
0.75X=7.5-2.4=5.1
X=5.1÷0.75
X=6.8