Question
Farmer Sam has 4 hens. The mass of Hen Q is the same as the average mass of the 4 hens. Hen R weighs 2 kg less than the average mass of the 4 hens. The mass of Hen S is 5 kg more than the average mass of the 4 hens. The mass of Hen T is 7 kg. Find the total mass of the 4 hens.
3 m

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Farmer Sam has 4 hens. The mass of Hen Q is the same as the average mass of the 4 hens. Hen R weighs 2 kg less than the average mass of the 4 hens. The mass of Hen S is 5 kg more than the average mass of the 4 hens. The mass of Hen T is 7 kg. Find the total mass of the 4 hens.