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A football stadium earned $60,000 in sold-out football ticket sales. Upper level tickets cost $25 per seat and lower level tickets cost $100 per seat. The number of upper level seats is four times the number of lower level seats. How many seats are in the upper level?
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25x + 100y = 60,000 x = 4y
x - upper level y - lower level
x = 4y, so: 25*4y + 100y = 60,000 100y + 100y = 60,000 200y = 60,000 y = 300 (lower level)
upper level: x = 4*y = 4*300 = 1200
Ohhh Thanks so much :))
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