Answer
$-\dfrac {3}{2}$
Work Step by Step
$e^{3-x}=\left( e^{3}\right) ^{-x}\Rightarrow e^{3-x}=e^{-3x}\Rightarrow 3-x=-3x\Rightarrow 2x=-3\Rightarrow x=-\dfrac {3}{2}$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 4 - Inverse, Exponential, and Logarithmic Functions - 4.2 Exponential Functions - 4.2 Exercises - Page 432: 78
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