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Marco is draining his two aquariums. The tanks are the same size. One tank has 7 in. of water in it, and it is being drained at a rate of 1 in./min. The other tank has 5 in. of water in it. It is being drained at a rate of 0.5 in./min. After how many minutes will the tanks contain the same amount of water?

User MarkJ
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in 4 minutes the first tank would have 3 in of water and the other would also have 3 in

User Alexander Zakusilo
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