Question
Beaker R had 6 ℓ of water at first. Cathy poured some water from beaker S to R until beaker R is filled with 9 ℓ of water. There were 5 ℓ of water left in beaker S. How many litres of water were there in beaker S at first?
3 m

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Beaker R had 6 ℓ of water at first. Cathy poured some water from beaker S to R until beaker R is filled with 9 ℓ of water. There were 5 ℓ of water left in beaker S. How many litres of water were there in beaker S at first?