Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 2 - Section 2.5 - Formulas and Problem Solving - Practice: 7


a = $\frac{P - b + c}{2}$

Work Step by Step

Isolate a on one side of the equation: P = 2a + b - c Subtract b and add c to both sides: P - b + c = 2a Divide both sides by 2: $\frac{P - b + c}{2}$ = a
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