Question
Oscar mixed 8 ℓ of concentrated juice with 12 ℓ of water to make mango juice to be served for the meeting. After the meeting, 7 ℓ of mango juice were left. How much mango juice was drunk at the meeting?
4 m

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Oscar mixed 8 ℓ of concentrated juice with 12 ℓ of water to make mango juice to be served for the meeting. After the meeting, 7 ℓ of mango juice were left. How much mango juice was drunk at the meeting?