exam Maths Puzzle Numerical Ability

2a+7=5

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someone please show me how to solve and check this problem...thank you..

5/y-4-8/y-4=2/y^2-16 Tickets for a play at the community theater cost $16 for an adult and $2 for a child. If 210 tickets were sold and the total receipts were $2380, how many of each type of ticket were sold?