Which equation is true for the value a = 7?

What term makes it inconsistent y=2x - 4

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?

Rewrite 9 log, x2 in a form that does not use exponents. 9log, x = log, x