#### Answer

$\displaystyle \frac{\ln 20}{\ln 9}$

#### Work Step by Step

$\ln 9$ and $ \ln 20$ are real numbers.
To isolate x, divide the equation with $\ln 9$.
Result:$\displaystyle \quad x=\frac{\ln 20}{\ln 9}$

Published by
Pearson

ISBN 10:
0-13446-914-3

ISBN 13:
978-0-13446-914-0

$\displaystyle \frac{\ln 20}{\ln 9}$

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