Question
The total mass of a rabbit, a cat and a dog is 6.3 kg. The cat is 0.2 kg heavier than the rabbit. The dog is 3 times as heavy as the cat. Find the mass of the dog.
4 m

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The total mass of a rabbit, a cat and a dog is 6.3 kg. The cat is 0.2 kg heavier than the rabbit. The dog is 3 times as heavy as the cat. Find the mass of the dog.