You and your three friends each get an admission ticket to the town carnival. You have a coupon for $20 off that will save your group money, If the total bill to get into the carnival was $100, how much does each admission ticket cost?
If the total bill to get into the carnival was $100, and you have a coupon for $20 off, then the total cost after the discount is $100 - $20 = $<<100-20=80>>80.
Since there are four of you, and you are splitting the cost equally, each admission ticket costs $80 / 4 = $<<80/4=20>>20. Answer: \boxed{20}.