3(4.5x-1.2)=7x+13.2
问题描述:
3(4.5x-1.2)=7x+13.2
答
6.5x=16.8 x=168/65
答
3(4.5x-1.2)=7x+13.2
13.5x-3.6=7x+13.2
6.5x=16.8
x=168/65