Question
Linda and Shannon's total mass is 30 kg. Shannon and Elyse's total mass is 76 kg. Elyse is three times as heavy as Linda. What is the average mass of the three friends?
3 m

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Linda and Shannon's total mass is 30 kg. Shannon and Elyse's total mass is 76 kg. Elyse is three times as heavy as Linda. What is the average mass of the three friends?