Предмет: Математика, автор: 20102006

сыну столько месяцев ,сколько лет отцу. Сумма их возрастов 39 лет . Сколько лет сыну?

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Автор ответа: vovashargorods

якщо х- це кількість місяців сина ,тоді 12*х- кількість місяців тата. розвязання Х+12*Х=39*12 13Х =468 Х=468:13 Х=36 -років тата тоді 36:12=3 -роки сину

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