Question
The total mass of a dog, a rabbit and a cat is 12.9 kg. The rabbit is 0.3 kg heavier than the dog. The cat is 4 times as heavy as the rabbit. Find the mass of the cat.
4 m

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The total mass of a dog, a rabbit and a cat is 12.9 kg. The rabbit is 0.3 kg heavier than the dog. The cat is 4 times as heavy as the rabbit. Find the mass of the cat.