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двум братьям вместе 28 лет.Сколько лет каждому если 2/3 возраста младшего брата равны 1/2возраста старшего брата?
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Предмет:
Математика -
Автор:
kymanie3uq - 5 лет назад
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Ответы 1
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Пусть старшему X леттогда младшему (28-x) летсоставим уравнение1/2x=2/3(28-x)1/2x=56/3 - 2/3x1/2x+2/3x=56/37/6x=56/3x=56/3 * 6/7x=112/7x=16 лет старшему брату28-16=12лет младшему
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Автор:
bo87 - 5 лет назад
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