Chapter 2 - Solving Equations - 2-2 Solving Two-Step Equations - Practice and Problem-Solving Exercises - Page 92: 42

$x=-10.5$

We need to get the x alone, so we use multiplication to cancel out division. As a result, we multiply both sides by 3 to get that $x-3=-13.5$. We now cancel out the subtraction by adding 3 on both sides, giving us a final answer of $x=-10.5$. We plug -10.5 in for x and confirm that our answer is, indeed, correct.