Answer
$x=-7$
Work Step by Step
$3^{x+3}=\frac{1}{81}=81^{-1}$
$3^{x+3}=(3^4)^{-1}$
$3^{x+3}=3^{-4}$
Using the One-to-One Property:
$x+3=-4$
$x=-4-3$
$x=-7$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 5 - Review Exercises - Page 412: 14
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