9. Find the number of tickets

60 tickets were sold in a circus per show. The cost of the ticket for a child is $₹$30 and the cost of the ticket for an adult is $₹$40 and the total amount received per show is $₹$2200. Find the number of tickets sold for adult and children using elimination method.

 

 

The number of adult tickets sold $=$ .

 

The number of children tickets sold $=$ .