Question

решите уравнение 

1)12х-(3х+1)=8
2)5х-(6-2х)=3+3(х+1)

Answer 1

1)12x-(3x+1)=8
12x-3x-1-8=0
9x-9=0
x=1

2) 5x-(6-2x)=3+3(x+1)
5x-6+2x=3+3x+3
7x-6=6+3x
7x-6-6-3x=0
4x-12=0
4x=12
x=3