Answer
$a=-9$
Work Step by Step
$-1=a+8$
Subtract 8 from both sides.
$-1-8=a+8-8$
$-9=a+0$
$a=-9$
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 9 - Basic Algebra - 9.6 Solving Equations - 9.6 Exercises - Page 668: 18
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