Answer
Additive inverse property
Work Step by Step
RECALL:
The additive inverse property states that for any real number $a$:
$a+(-a)=0$, so $-a+a=0$
The given statement is justified by the additive inverse property.
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.5 - Use of Properties - Problem Set 1.5 - Page 33: 7
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