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
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