How many ounces of pure cranberry juice and how many ounces of a citrus fruit drink containing 14% fruit juice should be mixed to get 172 oz of a fruit drink that is 25% fruit juice?

Acollege is selling tickets for a winter fund-raiser. one day, krissa sold 14 adult tickets and 8 student tickets for a total of $376. the next day, she sold 7 adult tickets and 11 student tickets for a total of $272. krissa wanted to find the price of one adult ticket, a, and the price of one student ticket, s. she wrote and solved the following system of equations.