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: 59

Answer

$r=-4$

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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