Answer
$\frac{2d}{5}$
Work Step by Step
A key rule to remember is that subtracting a negative is the same as addition.
Thus, $\frac{d}{5}$-(-$\frac{d}{5}$)=$\frac{d}{5}$+$\frac{d}{5}$=$\frac{2d}{5}$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 1 - Foundations for Algebra - 1-5 Adding and Subtracting Real Numbers - Practice and Problem-Solving Exercises - Page 36: 68
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