Question
Eva had 2480 mℓ more juice than Yen. After Eva gave Yen 480 mℓ of juice, the ratio of Eva's juice to Yen's juice became 7 : 3. How much juice did Eva have at first? Give your answer in millilitres.
4 m

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Eva had 2480 mℓ more juice than Yen. After Eva gave Yen 480 mℓ of juice, the ratio of Eva's juice to Yen's juice became 7 : 3. How much juice did Eva have at first? Give your answer in millilitres.