Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 5 - Number Theory and the Real Number System - Chapter Summary, Review, and Test - Review Exercises - Page 335: 18

Answer

$-15$

Work Step by Step

Change the operation to addition, and then change the sign of the second term to obtain the answer: $-7-8 = -7 + (-8) = -15$
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