Solve the problem.Devon purchased tickets to an air show for 7 adults and 2 children. The total cost was 
. The cost of a child's ticket was 
less than the cost of an adult's ticket. Find the price of an adult's ticket and a child's ticket.
A. adult's ticket: $25; child's ticket: $21
B. adult's ticket: $24; child's ticket: $20
C. adult's ticket: $22; child's ticket: $18
D. adult's ticket: $23; child's ticket: $19
Answer: D
Mathematics
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