To solve the exponential equation \( 5^x = 625 \), we can rewrite 625 in terms of base 5.
We know that:
\[ 625 = 5^4 \]
So, we can rewrite the equation as:
\[ 5^x = 5^4 \]
Since the bases are the same, we can set the exponents equal to each other:
\[ x = 4 \]
Thus, the solution is:
x = 4