Question
Sam is 9 kg heavier than Liam and 6 kg heavier than Sean. The average mass of the 3 men is 69 kg. Find the average mass of Liam and Sean.
2 m

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Sam is 9 kg heavier than Liam and 6 kg heavier than Sean. The average mass of the 3 men is 69 kg. Find the average mass of Liam and Sean.