Question
Yoko had 2120 mℓ more milk than Ivory. After Yoko gave Ivory 490 mℓ of milk, the ratio of Yoko's milk to Ivory's milk became 7 : 4. How much milk did Yoko have at first? Give your answer in millilitres.
4 m

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Yoko had 2120 mℓ more milk than Ivory. After Yoko gave Ivory 490 mℓ of milk, the ratio of Yoko's milk to Ivory's milk became 7 : 4. How much milk did Yoko have at first? Give your answer in millilitres.