Primo car rental agency charges 30 dollars per day plus 0.25 dollars per mile. Ultimo car rental agency charges 20 dollars per day plus 0.80 dollars per mile. Find the daily mileage for which the Ultimo charge is three times the Primo charge.
(30 + .25x) * 3 = 20 + .80 x solve for 'x' the number of miles for Ultimo = 3 * Primo
