Answer
0
Work Step by Step
Subtracting a number from itself is the same as adding the number to its inverse. The inverse property of addition tells us the sum will always be 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 - Practice and Problem-Solving Exercises - Page 36: 66
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