Tshirt sore keeps 7 white t-shirts on the shelves for every 3 purple t- shirts on the shelve how many white t-shirts on the shelve if 15 purple t-shirts on the shelve. show how you get the answer in long form

The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?