#### Answer

14

#### Work Step by Step

$5(n+4)=90$
$5(14+4)\overset?=90$
$5(18)\overset?=90$
$90\overset?=90\checkmark$
$5(16+4)\overset?=90$
$5(20)\overset?=90$
$100\overset?=90\ X$
$5(26+4)\overset?=90$
$5(30)\overset?=90$
$150\overset?=90\ X$

Published by
Pearson

ISBN 10:
0321955048

ISBN 13:
978-0-32195-504-3

14

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