MATH PROBLEM SPLVE ASAP PLS​

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

One positive number is 9 more than twice another. if their product is 95, find the numbers

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?