Answer
$-21\leq x\leq -9$
Work Step by Step
$-20\leq x+1 \leq-8$
$-21\leq x\leq -9$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Appendix C - Exercise Set - Page 987: 27
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