Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Appendix A - A.1 - Algebraic Expressions - Exercises - Page 534: 5c

Answer

$2$

Work Step by Step

Use commutative axiom for addition: $(-5)+7=7-5$ $7-5=2$
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