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Mathematics, 18.03.2021 20:00 pinkbutterfly03

When a jar is one-fifth filled with water, it weighs 560 g. When the same jar is four-fifths filled with water, it weighs 740 g. What is the weight of the empty jar?

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When a jar is one-fifth filled with water, it weighs 560 g. When the same jar is four-fifths filled...
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