Question
Tim is 10 kg heavier than Jack and 5 kg heavier than Archie. The average mass of the 3 men is 85 kg. Find the average mass of Jack and Archie.
2 m

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Tim is 10 kg heavier than Jack and 5 kg heavier than Archie. The average mass of the 3 men is 85 kg. Find the average mass of Jack and Archie.