=3x+3(x+1)+3(x+2)

Solution for =3x+3(x+1)+3(x+2) equation:

0=3x+3(x+1)+3(x+2)

We simplify the equation to the form, which is simple to understand 
0=3x+3(x+1)+3(x+2)

Reorder the terms in parentheses
0=3x+(+3x+3)+3*(x+2)

Remove unnecessary parentheses
0=+3x+3x+3+3+*(+x+2+)

Reorder the terms in parentheses
0=3x+3x+3+(+3x+6)

Remove unnecessary parentheses
0=+3x+3x+3+3x+6

We move all terms containing x to the left and all other terms to the right. 
-3x-3x-3x=+3+6-0

We simplify left and right side of the equation. 
-9x=+9

We divide both sides of the equation by -9 to get x. 
x=-1