How many adults and how many children attended a play?

Question

Admission prices at a school play were $6 for adults and $4 for children. The total receipts for the show were $1920 and 420 tickets were sold. How many adults and how many children attend the play

Answer 1

x = number of adults at $6 each

 

420 - x = number of children at $4 each

 

6x + 4(420 - x) = 1920

 

Solve for x, then get 420 - x, and finish from here.