algebra
posted by Anonymous on .
Three girls paid $100 each, a total of $300, to share a motel room. Later, the desk clerk realising she should have only charged $250, gives the room attendant $50 and asks him to return it to the three girls. Unable to divide the money three ways he decides to give $10 to each girl and pockets the remaining $20. The girls have now paid #90 each or $270 for the room, and the room attendent has $20. What happened to the other $10?

there is no other $10
hotel: 250
girls: 30
clerk: 20