contestada

*THIS QUESTION IS WORTH 80 POINTS TO WHOEVER CAN GIVE ME THE SOLUTION AND ANSWER TO THIS QUESTION:*

Question:

A school is organizing a classical music concert to finance a skiing trip. There are 100 tickets for sale: $ 15 tickets for adults and $ 9 for youth. Students sold three times as many adult tickets as youth tickets.

The goal of amassing $ 800 has been exceeded. In total, how many tickets were sold?