Mitch and his friends are planning a trip to the Tsunami Springs water park. The employee Mitch spoke to on the phone said the total cost for all 7 of them would be $154. This includes an entrance ticket and a $5 tube rental fee for each person. What is the cost of an entrance ticket?

Answer 1

Let x be the cost of an entrance ticket.
The cost of 7 entrance tickets is 7x.
The tube rental fee for each person is $5, so the total tube rental fee for 7 people is 5 * 7 = $<<5*7=35>>35.
The total cost for all 7 people is the cost of the entrance tickets plus the total tube rental fee, so 7x + 35 = 154.
Subtracting 35 from both sides of the equation, we get 7x = 154 - 35 = 119.
Dividing both sides of the equation by 7, we get x = 119 / 7 = $<<119/7=17>>17.
The cost of an entrance ticket is $17. Answer: \boxed{17}.