Chapter 2 - Solving Equations - 2-2 Solving Two-Step Equations - Practice and Problem-Solving Exercises - Page 91: 37

$x=-15$

We need to get the x alone. Thus, we cancel out the addition by subtracting 4 on both sides. This leaves us with the equation $-5=x/3$. In order to cancel out division, we use multiplication, so we multiply both sides by 3 to get that $x=-15$. We plug -15 in for x and confirm that our answer is, indeed, correct.