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Решите задачу при помощи уравнения. Возраст отца равен возрасту сына и дочери вместе.Сын вдвое старше дочери и на двадцать лет моложе отца. Сколько лет каждому?
Ответы 1
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Пусть возраст дочери х, тогда возраст сына 2х, а отца 2х+20. Составим уравнение х+2х=2х+203х=2х+20Х=20-возраст дочери20•2=40-возраст сына40+20=60-возраст отца
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Автор:
elliana - 5 лет назад
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