4 cars
he earns $1325/car and 5000/1325=3.7 so he needs to sell 4 cars
hope this helps!
y=1200+125x
so the equation would be 5000=1200+125x
5000-1200=1200-1200+125x
3800=125x
3800/125=125x/125
30.4=x
when x equals amount of cars, so he has to sell 31 cars.
