Answer
$x=3$
Work Step by Step
Use the rule $a^m=a^n \longrightarrow m = n$ to obtain:
$7^x=7^3 \longrightarrow x = 3$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.