Start by distributing through the parentheses on
each side of the equation to get 3x - 12 = 2x - 12.
Now move your x's to the left by subtracting
2x from both sides to get x - 12 = - 12.
Now move your numbers to the right by
adding 12 to both sides to get x = 0.
So, the solution to this equation is x = 0.