Answer
$c=28.5 $
Work Step by Step
The quantity inside of the parenthesis is being multiplied by 2/3. Thus, we first multiply by 3/2 to find that $c-18=10.5$ We then add 18 to each side to get that $c=28.5$.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 2 - Solving Equations - 2-3 Solving Multi-Step Equations - Practice and Problem-Solving Exercises - Page 98: 46
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