Answer
$b=\frac{R-3a}{3}$
Work Step by Step
$R=3(a+b)\\R=3a+3b\\3b=R-3a\\b=\frac{R-3a}{3}$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 2 - Section 2.3 - The Algebra of Functions - Exercise Set - Page 134: 84
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