In the given question it is already given that the original price of the ticket for the football game is "p". It is also given that the $63 is the discounted price of the ticket. $12.50 is the discount given on the original price of the ticket. These information's are enough for solving the given question.
We can write the equation as
p - 12.50 = 63
p = 63 + 12.50
= 75.50
So the original price of the ticket for the football game is $75.50