Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 1 - Expressions, Equations, and Inequalities - 1-4 Solving Equations - Lesson Check - Page 30: 4


$k = \frac{r-15}{2}$

Work Step by Step

Our goal is to isolate k. To do this we first need to subtract 15 from both sides and add 2k to both sides: r-2k = 15 r-15-2k = 0 r-15 = 2k We then need to divide both sides by two to get k by itself: r-15 = 2k $k = \frac{r-15}{2}$
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