Sort each equation according to whether it has one solution; infinitely many solutions, or no solutions. 5 (x-2) = 5x - 7
-3(x-4) = -3x + 12
4(x+1) = 3x + 4
-2x (x-3) = 2x - 6
6(x+5) = 6x + 11

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?