Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter R - Review of Basic Concepts - R.2 Real Numbers and Their Properties - R.2 Exercises: 66

Answer

$15 + a$

Work Step by Step

$(8+a)+7 = 8 + 7 + a = 15 + a$
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