Retro rides is a club for owners of vintage cars and motorcycles. every year the club gets together for a ride. this year, 39 vehicles participated in the ride. the total number of tires of all the vehicles was 116. assuming each car has 4 tires and each motorcycle has 2 tires, how many each of cars and motorcycles participated in the ride? 23 cars; 16 motorcycles 19 cars; 20 motorcycles 21 cars; 18 motorcycles 16 cars; 23 motorcycles