Question
Betty had 1820 mℓ more tea than Min. After Betty gave Min 470 mℓ of tea, the ratio of Betty's tea to Min's tea became 7 : 3. How much tea did Betty have at first? Give your answer in millilitres.
4 m

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Betty had 1820 mℓ more tea than Min. After Betty gave Min 470 mℓ of tea, the ratio of Betty's tea to Min's tea became 7 : 3. How much tea did Betty have at first? Give your answer in millilitres.