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OpenStudy (anonymous):
two planes left an airport at noon, one flew east and the other flew west at twice the speed. After 3 hours the planes were 2700mi apart. How fast was each plane flying
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OpenStudy (anonymous):
|dw:1314674148007:dw| so one is flying x miles/hour and the other is 2x/hour multiply each my 3/3 so one is 3x and the other is 6x so 3x+6x=2700 9x=2700 x=300 so 300 mph for the first plane, the second one was 600 mph
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