Answer
$x=-3$
Work Step by Step
We need to get the x alone. Thus, we cancel out the addition by subtracting 3 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 of the equation by 5 to get that $ x=-3$. We plug -3 in for x and confirm that our answer is, indeed, correct.