SOLUTION: At a concert, %720 was collected for hot dogs, hamburgers, and soft drinks. All three were sold for $1.00 each. Twice as many Hotdogs were sold as hamburgers and three times as man

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Question 137531: At a concert, %720 was collected for hot dogs, hamburgers, and soft drinks. All three were sold for $1.00 each. Twice as many Hotdogs were sold as hamburgers and three times as many soft drinks as hambugers were sold. The number of soft drinks sold was...120, 240, 360, or 480?
Answer by stanbon(48574) About Me  (Show Source):
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At a concert, %720 was collected for hot dogs, hamburgers, and soft drinks. All three were sold for $1.00 each. Twice as many Hotdogs were sold as hamburgers and three times as many soft drinks as hambugers were sold. The number of soft drinks sold was...120, 240, 360, or 480?
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Value Equation: d + h + s = 720 where d=#hotdogs,h=#hamburgers,s=#softdrinks
d = 2h
s = 3h
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Substitute to get:
2h + h + 3h = 720
6h = 720
h = 120 (# of hamburgers sold)
d=2h = 240 (# of hot dogs sold)
s=3h = 360 (# of soft drinks sold)
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Cheers,
Stan H.