Answer
See below.
Work Step by Step
If we want to subtract $b$ from $a$ this is the same as adding the additive inverse of b (-b) to $a$. Then follow the rules of adding two integers.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 5 - Number Theory and the Real Number System - 5.2 The Integers; Order of Operations - Exercise Set 5.2 - Page 271: 139
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