Chapter 2 - Solving Equations - 2-5 Literal Equations and Formulas - Practice and Problem-Solving Exercises - Page 112: 16

$y=2-7/2x$

We first isolate y by subtracting by 7x on both sides to get that $2y=4-7x$. We now divide by 2 on both sides to isolate y and get that: $y=2-7/2x$. We then plug in the different values of x: $y=2-7/2(5)=-31/2 \\\\ y=2-7/2(10)=-66/2 \\\\ y=2-7/2(15)=-101/2$