Answer
$a=11$
Work Step by Step
Subtracting 2a+4 from both sides gives
$3a-2a+4-4=15+2a-2a-4$ or $a=11$
Plugging in $a=11$ gives
$37=37$
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: 20
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