Question
Beaker C had 6 ℓ of water at first. Tina poured some water from beaker D to C until beaker C is filled with 7 ℓ of water. There were 8 ℓ of water left in beaker D. How many litres of water were there in beaker D at first?
3 m

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Beaker C had 6 ℓ of water at first. Tina poured some water from beaker D to C until beaker C is filled with 7 ℓ of water. There were 8 ℓ of water left in beaker D. How many litres of water were there in beaker D at first?