Hudson is blocking off several rooms in a hotel for guests coming to his wedding. The
hotel can reserve small rooms that can hold 3 people, and large rooms that can hold 6
people. Hudson booked a total of 19 rooms which can accommodate 87 guests
altogether. Write a system of equations that could be used to determine the number
of small rooms reserved and the number of large rooms reserved. Define the variables
that you use to write the system.