Question
Fred mixed 9 ℓ of concentrated juice with 13 ℓ of water to make orange juice to be served for the meeting. After the meeting, 6 ℓ of orange juice were left. How much orange juice was drunk at the meeting?
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Fred mixed 9 ℓ of concentrated juice with 13 ℓ of water to make orange juice to be served for the meeting. After the meeting, 6 ℓ of orange juice were left. How much orange juice was drunk at the meeting?