The Jurassic Zoo charges ​$14 for each adult admission and ​$7for each child. The total bill for the 200 people from a school trip was ​$1617.

Question

i am not understanding this please help 

it needs to know how many adults and children were at the zoo 

Answer 1

number of adults at $14 each = a

number of children at $7 each = 200 - a

 

($14)a + ($7)(200 - a) = $1617

 

14a + 1400 - 7a = 1617

7a = 217

 

a = 31

200 - a = 200 - 31 = 169

 

There are 31 adults and 169 children.