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: 11

Answer

$$D = T - pm$$

Work Step by Step

To solve this equation for $D$, we need to isolate $D$ to one side of the equation. To isolate $D$, we need to get rid of everything else on the side of the equation with the $D$ term. The term $pm$ is added to $D$, so we do the opposite operation to both sides of the equation to get rid of $pm$ and still keep the equation equal on both sides. If we subtract $pm$ from both sides of the equation, we get $D$ by itself: $$D = T - pm$$
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