Question
Xuan had 21 ℓ of lemon juice. She used 16 of the lemon juice for a picnic and 37 of the remaining lemon juice to bake lemon-flavoured cookies. How much lemon juice did she have left? Give your answer in litres.
2 m

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Xuan had 21 ℓ of lemon juice. She used 16 of the lemon juice for a picnic and 37 of the remaining lemon juice to bake lemon-flavoured cookies. How much lemon juice did she have left? Give your answer in litres.