Question
When 56 of a glass is filled with coffee, it weighs 710 g. When the glass is half-filled with coffee, it weighs 630 g. Find the mass of the empty glass.
4 m

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When 56 of a glass is filled with coffee, it weighs 710 g. When the glass is half-filled with coffee, it weighs 630 g. Find the mass of the empty glass.