Conor buys 75 tokens for games at the arcade. the price to play each game is 3 tokens. if conor has already played x games, which expression is equivalent to the number of tokens that remain?

For this case we have the following variables:
 x: number of games
 y: number of remaining tokens
 The expression that models the problem is given by:
 y = -3x + 75
 
 the number of tokens that remain is:
 y = -3x + 75