Question
Beaker K had 3 ℓ of water at first. Marion poured some water from beaker L to K until beaker K is filled with 4 ℓ of water. There were 4 ℓ of water left in beaker L. How many litres of water were there in beaker L at first?
3 m

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Beaker K had 3 ℓ of water at first. Marion poured some water from beaker L to K until beaker K is filled with 4 ℓ of water. There were 4 ℓ of water left in beaker L. How many litres of water were there in beaker L at first?