So first, here, you would want to open the parenthesis with the distributive property.
3x + 9 = 6 (x - 2)
= 3x + 9 = 6x - 12
Then you would want to move all like terms to either side.
-21 = -3x
Now divide both sides by -3
7 = x
(I did it wrong in the beginning)
