6.05]An auditorium earned $30,000 in sold−out concert ticket sales. Front section tickets cost $75 per seat and back section tickets cost $50 per seat. The number of front section seats is twice the number of back section seats. How many seats are in the front section?
you form 2 equations let x be number front seats and y number back seats: x = 2y 75x + 50y = 30,000 substitute for x in second equation: 75(2y) + 50y = 30000 200y = 30000 y = 150 and x = 2y = 300 there are 300 seats in the front section
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