Answer
$x=-1$
Work Step by Step
Let $\log_7 7^{-1}=x$. Using properties of logarithms, then,
\begin{array}{l}
-1(\log_7 7)=x\\
-1=x\\
x=-1
\end{array}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 11 - Cumulative Review - Page 670: 27b
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