#### Answer

b = 2A - a

#### Work Step by Step

To solve for b, isolate b on one side of the equation:
A = $\frac{a + b}{2}$
Multiply both sides by 2:
2A = a + b
Subtract a from both sides:
2A - a = b

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

b = 2A - a

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