#### Answer

$x=3$

#### Work Step by Step

Use the rule power rule: $a^p=a^q$ .
We can see that the base $a=7$ is same on both sides of the equation .
So, the exponents will also be equal.
This implies that $p=q$
Therefore, $7^x=7^3\implies x=3$

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Published by
Pearson

ISBN 10:
0-32193-104-1

ISBN 13:
978-0-32193-104-7

$x=3$

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