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 - Page 20: 79



Work Step by Step

Written horizontally, this problem reads $5-12$ In order to subtract $12$ from $5$, we find $12-5$, and put a negative out front because the number being subtracted ($12$) is larger. Therefore, $5-12=-(12-5)=-7$
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