n = t/p
t = total number of meters
p = length of a lap (in meters)
n = number of laps frank swims
Determine the length of a lap, p.
n = t/p
1) remove p as a denominator by multiplying both side w/ p.
p*n = p(t/p)
pn = t
2) remove n by dividing both sides with n.
pn / n = t/n
*numerator n and denominator n cancels each other out.
p = t/n
