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" A person has four casks, the second of which being filled from the first, leaves the first four-sevenths full. The third being filled from the second, leaves it one-fourth full, and when the third is emptied into the fourth, it is found to fill only nine-sixteenths... "
Elementary Algebra: Embracing the First Principles of the Science - Σελίδα 273
των Charles Davies - 1850 - 279 σελίδες
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