Question
When 710 of a cup is filled with coffee, it weighs 840 g. When the cup is half-filled with coffee, it weighs 750 g. Find the mass of the empty cup.
4 m

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When 710 of a cup is filled with coffee, it weighs 840 g. When the cup is half-filled with coffee, it weighs 750 g. Find the mass of the empty cup.