Question
A box containing 60 post-it-pads had a mass of 21.31 kg. A box containing 25 staplers has a mass of 26.56 kg. The mass of each stapler was thrice that of each post-it-pad. Find the mass of the empty box in grams.
4 m

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A box containing 60 post-it-pads had a mass of 21.31 kg. A box containing 25 staplers has a mass of 26.56 kg. The mass of each stapler was thrice that of each post-it-pad. Find the mass of the empty box in grams.