Question
Farmer Michael has 4 cats. The mass of Cat Q is the same as the average mass of the 4 cats. Cat R weighs 1 kg less than the average mass of the 4 cats. The mass of Cat S is 9 kg more than the average mass of the 4 cats. The mass of Cat T is 8 kg. Find the total mass of the 4 cats.
3 m

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Farmer Michael has 4 cats. The mass of Cat Q is the same as the average mass of the 4 cats. Cat R weighs 1 kg less than the average mass of the 4 cats. The mass of Cat S is 9 kg more than the average mass of the 4 cats. The mass of Cat T is 8 kg. Find the total mass of the 4 cats.