Answer
$0$
Work Step by Step
Recall the following rule:
$a+(-a)=0$
Thus, we know that all numbers that are additive inverses of each other are equal to zero.
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 1 - Section 1.2 - Operations with Real Numbers and Simplifying Algebraic Expressions - Concept and Vocabulary Check - Page 26: 2
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