Callie H. answered 01/13/19
National Board Certified Teacher can help you/your child in all areas
You need to know the total cost of the rent in order to do the problem. Figure out the unit price per person per night. Take the total cost and divide it by 27 -- that's the total number of nights a person is staying (6 x 4 = 24 plus 3 for the other person). Then multiply that number by 4 to find the cost for the people staying 4 nights, and by 3 to find the cost for the 7th person.