3(4.5x-1.2)=7x+13.2

问题描述:

3(4.5x-1.2)=7x+13.2

6.5x=16.8 x=168/65

3(4.5x-1.2)=7x+13.2
13.5x-3.6=7x+13.2
6.5x=16.8
x=168/65