David is deciding between two parking garages. Garage A charges an initial fee of $7 to park plus $3 per hour. Garage B charges an initial fee of $4 to park plus $4 per hour. Let AA represent the amount Garage A would charge if David parks for tt hours, and let BB represent the amount Garage B would charge if David parks for tt hours. Write an equation for each situation, in terms of t, t, and determine which garage would be cheaper if David needs to park for 2 hours.