Question
Raeann had 2180 mℓ more coffee than Shiyun. After Raeann gave Shiyun 570 mℓ of coffee, the ratio of Raeann's coffee to Shiyun's coffee became 7 : 3. How much coffee did Raeann have at first? Give your answer in millilitres.
4 m

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Raeann had 2180 mℓ more coffee than Shiyun. After Raeann gave Shiyun 570 mℓ of coffee, the ratio of Raeann's coffee to Shiyun's coffee became 7 : 3. How much coffee did Raeann have at first? Give your answer in millilitres.