Question
A box containing 80 highlighters had a mass of 2.2 kg. A box containing 25 files has a mass of 2.6 kg. The mass of each file was four times that of each highlighter. Find the mass of the empty box in grams.
4 m

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A box containing 80 highlighters had a mass of 2.2 kg. A box containing 25 files has a mass of 2.6 kg. The mass of each file was four times that of each highlighter. Find the mass of the empty box in grams.