Maria bought seven boxes. a week later half of all her boxes were destroyed in a fire. there are only 22 boxes left. how many did she start out with

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)