A truck has 6 wheels. A car has 4 wheels. 14 trucks and cars parked in a parking lot have a total of 72 wheels. How many trucks are there? How many cars are there?
t = trux wheels = 6t
c = car = 14-t wheels = 4(14-t) summed = 72
6t + 4 (14-t) = 72 solve for t then c = 14-t