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: 50

Answer

$z=1$

Work Step by Step

Step 1. Combine like terms on the right side of the equation. $-5=10z-15z=(10-15)z=-5z$ Step 2. Divide both sides by -5. $\frac{-5}{-5}=\frac{-5z}{-5}$ $z=1$
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