3(4.5x-1.2)=7x+13.2yetrtd
问题描述：
3(4.5x-1.2)=7x+13.2
yetrtd
答
13.5x-3.6=7x+13.2
6.5x=16.8
x=2.58
答
1
答
3(4.5x-1.2)=7x+13.2
3×4.5x-3×1.2=7x+13.2
13.5x-3.6=7x+13.2
13.5x-7x=13.2+3.6
6.5x=16.8
x=16.8÷6.5
x=168/65