There are 789 freshmen at fordham university. the university must give 2 pillows to each freshman that is living on campus. how many more pillows do they need to purchase?

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.