Answer
$c=-9$
Work Step by Step
Multiplying both sides by 3 gives $21-5*c=66$
Then subtract 21 from both sides,
$-5*c=45$
Then divide both sides by -5,
to get $c-=-9$
Checking gives:
$7-5/3*-9=22$ or $7+15=22$
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: 17
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