Question
The total mass of a kitten, a mouse and a puppy is 5.7 kg. The mouse is 0.3 kg heavier than the kitten. The puppy is 2 times as heavy as the mouse. Find the mass of the puppy.
4 m

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The total mass of a kitten, a mouse and a puppy is 5.7 kg. The mouse is 0.3 kg heavier than the kitten. The puppy is 2 times as heavy as the mouse. Find the mass of the puppy.