Предмет: Математика, автор: vampir54871

мама старше вани в 3 раза сколько лет ване и сколько лет маме если она старше сына на 26 лет

Ответы

Автор ответа: aset2004

0

мама=а
ваня=в
а=в×3
в=а-26
а=(а-26)×3
а=3а-78
2а=78
а=39
в=39-26
в=13

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