Question
Diana had 2220 mℓ more juice than Tina. After Diana gave Tina 470 mℓ of juice, the ratio of Diana's juice to Tina's juice became 7 : 3. How much juice did Diana have at first? Give your answer in millilitres.
4 m

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Diana had 2220 mℓ more juice than Tina. After Diana gave Tina 470 mℓ of juice, the ratio of Diana's juice to Tina's juice became 7 : 3. How much juice did Diana have at first? Give your answer in millilitres.