Question
Zeph mixed 7 ℓ of concentrated juice with 13 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?
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Zeph mixed 7 ℓ of concentrated juice with 13 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?