Question
Yen had 1540 mℓ more juice than Betty. After Yen gave Betty 430 mℓ of juice, the ratio of Yen's juice to Betty's juice became 7 : 3. How much juice did Yen have at first? Give your answer in millilitres.
4 m

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Yen had 1540 mℓ more juice than Betty. After Yen gave Betty 430 mℓ of juice, the ratio of Yen's juice to Betty's juice became 7 : 3. How much juice did Yen have at first? Give your answer in millilitres.