Answer
0
Work Step by Step
If you add a number and it's opposite it will always equal 0. For example, 6 + -6=0 or 7 + -7=0
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 1 - Foundations for Algebra - 1-5 Adding and Subtracting Real Numbers - Lesson Check - Page 33: 7
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