Предмет: Математика, автор: марты

одно число в 3 раза меньше другого,а их сумма равна 28

Ответы

Автор ответа: iras8

х-первое число

3х-второе число

х+3х=28

4х=28

х=28:4

х=7 первое число

3*7=21 второе число

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