PLEASE HELP ASAP 24 Points!!
Sarah took the advertising department from her company on a round trip to meet with a potential client. Including Sarah a total of 9 people took the trip. She was able to purchase coach tickets for $360 and first class tickets for $1260. She used her total budget for airfare for the trip, which was $7740. How many first class tickets did she buy? How many coach tickets did she buy?