+23254 If the variable is in an exponent, find the log (or ln) of both sides:
log(3125) = log(5^e) With logs, exponents come out as multipliers:
log(3125) = e x log(5)
log(3125) / log(5) = e ---> e = 5
If you haven't had logs, think of it this way:
Is 3125 some power of 5? Not 1, 2, 3, or 4; but 5^5 = 3125.
Since 3125 = 5^5, e must be 5.
