Answer
$\underline{\text{additive inverses of each other}}.$
Work Step by Step
The correct answer is: additive inverses of each other.
Intermediate Algebra (12th Edition)
by Lial, Margaret L.; Hornsby, John; McGinnis, Terry
Published by
Pearson
ISBN 10:
0321969359
ISBN 13:
978-0-32196-935-4
Chapter R - Section R.2 - Operations on Real Numbers - R.2 Exercises - Page 20: 7
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