Let x represent the regular price of a ticket to a basketball tournament.
Discount tickets to a basketball tournament sell for $4.00 each. Sam spent $60.00 on discount tickets. This means that the number of tickets that Sam bought is
60/4 = 15 tickets
The cost of 15 tickets at the regular price is 15x
Since the amount he paid is $37.5 lesser than what he would have paid if he bought the tickets at the regular price, then