Question
Tina had 2400 mℓ more juice than Jen. After Tina gave Jen 580 mℓ of juice, the ratio of Tina's juice to Jen's juice became 7 : 3. How much juice did Tina have at first? Give your answer in millilitres.
4 m

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Tina had 2400 mℓ more juice than Jen. After Tina gave Jen 580 mℓ of juice, the ratio of Tina's juice to Jen's juice became 7 : 3. How much juice did Tina have at first? Give your answer in millilitres.