Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 9 - Basic Algebra - 9.7 Solving Equations with Several Steps - 9.7 Exercises - Page 678: 59



Work Step by Step

Step 1. Subtract 9 from both sides of the equation. $2.5r+9-9=-1-9$ $2.5r=-10$ Step 2. Divide both sides by 2.5. $\frac{2.5r}{2.5}=\frac{-10}{2.5}$ $r=-4$
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