Question
Three buckets contain an average of 48 ℓ of washing liquid. The 1st bucket contains 54 ℓ of washing liquid and the 2nd bucket contains 12 ℓ more washing liquid than the 1st bucket. How much washing liquid does the 3rd bucket contain?
2 m

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Three buckets contain an average of 48 ℓ of washing liquid. The 1st bucket contains 54 ℓ of washing liquid and the 2nd bucket contains 12 ℓ more washing liquid than the 1st bucket. How much washing liquid does the 3rd bucket contain?