(3x-17)° what is x and how do I find it ?

Will gve pints stars and brainliest

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?

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39