Question
Lee is 11 kg heavier than Ben and 7 kg heavier than Rael. The average mass of the 3 men is 80 kg. Find the average mass of Ben and Rael.
2 m

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Lee is 11 kg heavier than Ben and 7 kg heavier than Rael. The average mass of the 3 men is 80 kg. Find the average mass of Ben and Rael.