Question
A box containing 45 punchers had a mass of 7.45 kg. A box containing 15 notebooks has a mass of 9.85 kg. The mass of each notebook was four times that of each puncher. Find the mass of the empty box in grams.
4 m

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A box containing 45 punchers had a mass of 7.45 kg. A box containing 15 notebooks has a mass of 9.85 kg. The mass of each notebook was four times that of each puncher. Find the mass of the empty box in grams.