Question
Tammy and Eva's total mass is 36 kg. Eva and Wendy's total mass is 69 kg. Wendy is four times as heavy as Tammy. What is the average mass of the three friends?
3 m

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Tammy and Eva's total mass is 36 kg. Eva and Wendy's total mass is 69 kg. Wendy is four times as heavy as Tammy. What is the average mass of the three friends?