Answer
$z=-12$
Work Step by Step
Adding 13 to each side gives us $z-13+13=13-1$ or $z=12$
Plugging it back in gives $12-13=-1$ which is correct.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 1, Equations and Inequalities - 1.3 Solve Linear Equations - 1.3 Exercises - Skill Practice - Page 21: 5
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