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biancabell3
20.09.2020 •
Mathematics
a 2000L tank containing 550L of water is being filled with water at the rate of 75L/minute from a full 1600L tank. How long will it be before the two tanks have the same amount of water? How much water will be in the tank at this time ?
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Ответ:
3c+12=75
subtract 12 from both sides
3c=63
divide both sides by 3
c=21