Question
Farmer Ethan has 4 dogs. The mass of Dog R is the same as the average mass of the 4 dogs. Dog S weighs 8 kg less than the average mass of the 4 dogs. The mass of Dog T is 9 kg more than the average mass of the 4 dogs. The mass of Dog U is 11 kg. Find the total mass of the 4 dogs.
3 m

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Farmer Ethan has 4 dogs. The mass of Dog R is the same as the average mass of the 4 dogs. Dog S weighs 8 kg less than the average mass of the 4 dogs. The mass of Dog T is 9 kg more than the average mass of the 4 dogs. The mass of Dog U is 11 kg. Find the total mass of the 4 dogs.