3) A Hotel has 260 rooms-some singles and some doubles. The singles cost $35 per night and the doubles cost $60 per night. During a Packers game weekend all rooms were occupied. The sales for the night were $14,000. Johnny wrote the following system but forgot to define the variable with let statements x + y = 260 { 60x + 35y = 14000 a. Use words to write the let statements for Johnny's system: i. Let I= ii. Let y b. Solve Johnny's system