Question
Farmer Sean has 4 dogs. The mass of Dog C is the same as the average mass of the 4 dogs. Dog D weighs 8 kg less than the average mass of the 4 dogs. The mass of Dog E is 9 kg more than the average mass of the 4 dogs. The mass of Dog F is 10 kg. Find the total mass of the 4 dogs.
3 m

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Farmer Sean has 4 dogs. The mass of Dog C is the same as the average mass of the 4 dogs. Dog D weighs 8 kg less than the average mass of the 4 dogs. The mass of Dog E is 9 kg more than the average mass of the 4 dogs. The mass of Dog F is 10 kg. Find the total mass of the 4 dogs.