Answer:
Explanation:
Let's start with simplifying the equation. To do this, let's simplify the parenthesis. We can use the distributive property to simplify the parenthesis. We now have
Next, we can start adding. We can add 2x and 6x, and 9 and 3.
Now that we've simplified the equation, we can start solving the equation. First, let's subtract 12 from each side.
The last thing that we need to do is divide -4 from each side.