Answer
True
Work Step by Step
Since subtracting a number is the same as adding its opposite, a number minus its opposite is the same as adding the number to itself, which is twice the number.
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 - Practice and Problem-Solving Exercises - Page 35: 60
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