МАТЕМАТИКА 6 КЛАС ДО ТЬ БУДЬ ЛАСКА, КОНТРОЛЬНА.
У двох однакових бочках містилася однакова кількість води. Після того як з першої бочки взяли 2/7 води, а з другої - 1/5 і ще 9 літрів, то виявилося, що в трьох бочках води знову стало порівну. Яка кількість води була в вроцлаві спочатку?
mertysan
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27.05.2020 19:08
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