Предмет: Математика, автор: 77777735

сделайте подалуйста 17 задание

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Автор ответа: andreilis48

0

5/6 части - за 3 1/2, или 7/2 часа

все задание (1 часть) - х часов.

Составляем пропорцию и решаем

х = 1 * 7/2 : 5/6 = 7/2 * 6/5 = 21/5 = 4 1/5 часа

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