#### Answer

$\frac{\ln20}{\ln9}$

#### Work Step by Step

If $x\ln9$ = $\ln20$, then $x=\frac{\ln20}{\ln9}$.
This is mentioned on page 481.

Published by
Pearson

ISBN 10:
0-32178-228-3

ISBN 13:
978-0-32178-228-1

$\frac{\ln20}{\ln9}$

If $x\ln9$ = $\ln20$, then $x=\frac{\ln20}{\ln9}$.
This is mentioned on page 481.

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