The Jurassic Zoo charges ​$15 for each adult admission

Question

The Jurassic Zoo charges $15 for each adult admission and $2 for each child. The total bill for the 76 people from a school trip was $438. How many adults and how many children went to the zoo?

 

Answer 1

Let x = the cost for each child

Let y = the cost for each adult

x + y = 76      x = 76 - y

2x + 15y = 438

2(76 - y) + 15y = 438

152 - 2y + 15y = 438

13y = 286

y = 22

x = 76 - 22

x= 54