Question
There was some pomegranate juice in a jug at first. When 820 mℓ of pomegranate juice was poured into it, 250 mℓ of pomegranate juice flowed out of the jug. If the capacity of the jug was 580 mℓ, how much pomegranate juice was in the jug at first?
2 m

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There was some pomegranate juice in a jug at first. When 820 mℓ of pomegranate juice was poured into it, 250 mℓ of pomegranate juice flowed out of the jug. If the capacity of the jug was 580 mℓ, how much pomegranate juice was in the jug at first?