#### Answer

$\approx -13.257$

#### Work Step by Step

$6^{x+3}=4^{x}\Rightarrow 6^{3}\times 6^{x}=4^{x}\Rightarrow \left( \dfrac {6}{4}\right) ^{x}=6^{-3}\Rightarrow x=\log _\frac {6}{4}6^{-3}\approx -13.257$

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$\approx -13.257$

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