Some motorcycles with $2$ wheels, cars with $4$ wheels and lorries with $6$ wheels are in a car park. There\textquotesingle s a total of $$27$$ vehicles and $$96$$ wheels. The number of cars is equal to the number of lorries. Find the number of cars in the car park. 
Overseas Competition->Knowledge Point->Word Problem Modules->Chicken-Rabbit Problems->Solving Chicken-Rabbit Problems by Using Hypothesis