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say x= the amount of water in one tank

x+3000=6(x-3000) (you subtract 3000 from one tank and give it to the other)

x+3000=6x-18000

21000=5x

21000/5=x

4200=x

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Related Questions

Two tanks contain equal amounts of water They are connected by a pipe and 3000 liters of water is pumped from one tank to the other One tank then contains 6 times as much water as the other How man?

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