#### Answer

$x=-3$

#### Work Step by Step

We need to get the x alone. Thus, we cancel out the subtraction by adding 2 on both sides. This leaves us with the equation $-5x=15$. In order to cancel out multiplication, we use division, so we divide both sides by -5 to get that $x=-3$. We plug -3 in for x and confirm that our answer is, indeed, correct.