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 - 1.5 - Use of Properties - Problem Set 1.5 - Page 33: 28



Work Step by Step

We start with the given expression: $-16-14+18+21+14-17$ We use the commutative property of addition to rearrange some of the terms in order to make it easier to add: $18-16+14-14+21-17$ We apply the associative property to group terms that are easy to subtract: $(18-16)+(14-14)+(21-17)$ We subtract inside each of the parentheses: $2+0+4$ We add from left to right: $2+4=6$
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