Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 2 - Section 2.4 - Formulas and Percents - Exercise Set - Page 152: 20


$$b = 2A - a$$

Work Step by Step

To solve this equation for $b$, we need to isolate $b$. We first divide both sides by $\frac{1}{2}$, which means we will multiply each side by the inverse, which is $2$: $$2A = a+b$$ We then subtract $a$ from each side: $$b = 2A - a$$
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