Mathematics, 30.11.2021 05:00 bre2795

A broadway theater has 400 seats, divided into orchestra, main, and balcony seating. Orchestra seats sell for $60, main seats for S50, and balcony seats for $30. If all the seats are sold, the gross revenue to the
theater is $18,400. If all the main and balcony seats are sold, but only half the orchestra seats are sold, the gross revenue is $16,000. How many are there of each kind of seat?

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