A Broadway theater has 700 ​seats, divided into​ orchestra, main, and balcony seating. Orchestra seats sell for $60, main seats for $50, and balcony seats for $30. If all the seats are​ sold, the gross revenue to the theater is $32,000.If all the main and balcony seats are​ sold, but only half the orchestra seats are​ sold, the gross revenue is $27,800. How many are there of each kind of​
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