Answer
$-2$
Work Step by Step
$3^x=9^{x+1}$,
$x\ ln3=(x+1)ln9$,
$x\ ln3=2(x+1)ln3$,
$-x\ ln3=2ln3$,
thus $x=-2$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 10 - Systems of Equations and Inequalities - Cumulative Review - Page 817: 4
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