4分之3(x-0.4)=4.2

问题描述:

4分之3(x-0.4)=4.2
怎么列式

4分之3(x-0.4)=4.2
0.75(x-0.4)=4.2 两边同时除以0.75得
x-0.4=5.6
x=5.6+0.4
x=6