Aisha bought 15 apples and oranges for $9. 0. Each orange costs $0. 50, and each apple costs $0. 65. Let x represent the number of oranges and y represent the number of apples. Which system can be used to find the number of apples and oranges aisha bought? x + y = 15. 0. 5 x + 0. 65 y = 9. 00 x = y. 0. 5 x + 0. 65 y = 9. 00 x + y = 9. 0. 5 x + 0. 65 y = 15. 00 x = y. 0. 5 x + 0. 65 y = 15. 0.