A coin is weighted so it comes up head 3/4 of the time and tails 1/4 of the time. You play a game where this coin is flipped. If it comes up heads, you must pay 1 dollar. If it comes up tails, you win 2 dollars. What is the Expected Value of your winnings in this game?

I solved this portion and had the answered verified : 3/4 x -$1 + 1/4 x $2 = -0.25

I need help with calculating the Fair Play value. The second part goes as follows:

Assume that you still have to pay $1 if the coin comes up heads. In order for the game to be fair (where Expected Value = 0), how much should you win if the coin comes up tails?

Please provide the solution, not just the answer. I'll understand better that way. thanks