I need help with 11. Please tell me the answer and how to do it :)

Arianna is buying plants for her garden. she buys 15 flowering plants for $96. pink flowering plants sell for $8, and purple flowering plants sell for $5. how many pink flowering plants did arianna buy? i figured out the answer! the answer is 7. 8x +5y = 96 plug in 7 for x 8 (7) + 5y = 96 56 + 5y = 96 subtract 56 from both sides 5y/y = 40/5 y = 8 she bought 7 pink and 8 purple plants

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers