Answer
$z=3$
Work Step by Step
We are given the equation $2z-7z=-15$. In order to solve, we must first combine like terms on the left side.
$2z-7z=(2-7)z=-5z=-15$
Divide both sides by -5.
$\frac{-5z}{-5}=\frac{-15}{-5}$
Therefore, $z=3$.
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 9 - Basic Algebra - Mixed Review Exercises - Page 700: 20
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