How do you solve this problem (5x+10)=(2-7x)

Ineed no it anyone can see this

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?

Im so bad at fractions they are not my best math thing to work on