Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.3 - Integers: Addition and Subtraction - Problem Set 1.3: 88



Work Step by Step

Written horizontally, this problem reads $-27-15$ When we subtract a negative from a negative, we can add the two numbers and put a negative out front: $-(27+15)$ We perform addition to get $-42$
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