Answer: 20 - 2d
Explanation:
Since Mark bought 2 drinks and a drink cost d dollars the drinks are represented by 2d.
he brought $20 in all to the game so you would have to subtract how much the drinks cost from the total amount of money he bought to the game.
So you would get the expression 20 - 2d = m
Where m represents the money that he has after the game.