You can put this solution on YOUR website! To solve for "n", we need to "peel away" the rest of the right side of the equation. First isolate the log by dividing by 62.5:
To eliminate a log, rewrite the equation in exponential form. In general is equivalent to . Using this pattern (and the fact that the base of ln is "e") we get:
Subtracting 1 from each side:
Multiplying each side by -80: