Mathematics, 07.07.2019 17:00 coopera1744

На первой полке книг в 3 раза больше чем на второй, а на двух полках вместе 120 книг. сколько книг на каждой полке

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На первой полке книг в 3 раза больше чем на второй, а на двух полках вместе 120 книг. сколько книг н...

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