Question
Beaker W had 2 ℓ of water at first. Eva poured some water from beaker X to W until beaker W is filled with 7 ℓ of water. There were 5 ℓ of water left in beaker X. How many litres of water were there in beaker X at first?
3 m

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Beaker W had 2 ℓ of water at first. Eva poured some water from beaker X to W until beaker W is filled with 7 ℓ of water. There were 5 ℓ of water left in beaker X. How many litres of water were there in beaker X at first?