Alright! In order to solve this problem you first have to divide both since by four (since it's the opposite of multiplying by 4):

And you're left with:
x + 2 = 9
Now you subtract 2 from both sides and you're left with:
x = 7.
To check it you simply plug in seven:
4(7 + 2) = 36
36 = 36 √