7. Adult tickets to a play cost $22. Tickets for children cost $15. Tickets for a group of 11 people cost a total
of $228. Write and solve a system of equations to find how many children and how many adults were in
the group.

A.2 children, 9 adults
B.4 children, 7 adults
C.5 children, 6 adults
D.7 children, 4 adults