Chapter 2 - Solving Equations - 2-2 Solving Two-Step Equations - Practice and Problem-Solving Exercises - Page 91: 26

y=24

We need to get the y alone. We use multiplication to cancel out division, so we multiply both sides by 2 to get that $y-4=20$. We now cancel out the subtraction by adding 4 on both sides, giving us a final answer of y=24. We plug 24 in for y and confirm that our answer is, indeed, correct.