Question
Three pitchers, R, S and T, contain a total of 18.9 ℓ of water. Pitcher R contains 2.4 ℓ of water more than Pitcher S. Pitcher S contains 3.3 ℓ of water more than Pitcher T. What is the volume of water in Pitcher S?
3 m

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Three pitchers, R, S and T, contain a total of 18.9 ℓ of water. Pitcher R contains 2.4 ℓ of water more than Pitcher S. Pitcher S contains 3.3 ℓ of water more than Pitcher T. What is the volume of water in Pitcher S?