3(2x+4)=x+2
6x + 12 = x + 2
6x - x = 2 - 12
5x = -10 /:5
x = -2
12-x=5(x+3)-3(x+5)
12 - x = 5x + 15 - 3x - 15
12 - x = 2x
-x - 2x = -12
-3x = -12 /:(-3)
x = 4
