Question
A box containing 40 files had a mass of 16.64 kg. A box containing 25 highlighters has a mass of 20.64 kg. The mass of each highlighter was twice that of each file. Find the mass of the empty box in grams.
4 m

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A box containing 40 files had a mass of 16.64 kg. A box containing 25 highlighters has a mass of 20.64 kg. The mass of each highlighter was twice that of each file. Find the mass of the empty box in grams.