Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 9 - Basic Algebra - 9.7 Solving Equations with Several Steps - 9.7 Exercises: 14

Answer

$r=16$

Work Step by Step

We are given the equation $-\frac{5}{8}r+4=-6$. In order to solve, we can first subtract 4 from both sides. $-\frac{5}{8}r+4-4=-6-4$ $-\frac{5}{8}r=-10$ Multiply both sides by $-\frac{8}{5}$. $(-\frac{5}{8}r\times-\frac{8}{5})=r=-10\times-\frac{8}{5}=\frac{80}{5}=16$ $r=16$
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