Question
Lucy had 2200 mℓ more soy milk than Marion. After Lucy gave Marion 590 mℓ of soy milk, the ratio of Lucy's soy milk to Marion's soy milk became 7 : 4. How much soy milk did Lucy have at first? Give your answer in millilitres.
4 m

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Lucy had 2200 mℓ more soy milk than Marion. After Lucy gave Marion 590 mℓ of soy milk, the ratio of Lucy's soy milk to Marion's soy milk became 7 : 4. How much soy milk did Lucy have at first? Give your answer in millilitres.