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Mathematics, 14.02.2021 22:40 battlemarshmell

первый день прошли за 4 часа, второй день за 6 часов. Известно что второй день прошли на 20 км больше чем за первый. Сколько километров прошли за первый день​

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первый день прошли за 4 часа, второй день за 6 часов. Известно что второй день прошли на 20 км больш...
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