Предмет: Математика, автор: Аноним

Через 3 года бабушка будет в 4 раза старше своей внучки. Cейчас внучке 12 лет. Сколько сейчас лет бабушке?

помогите пожалуйста.​

Vadim12233: Можно, пожалуйста, "Лучший ответ"
Vadim12233: Спасибо

Ответы

Автор ответа: ungelboy2000
1

Ответ:

57 лет

Пошаговое объяснение:

Автор ответа: Vadim12233
2

Ответ:

57 лет

Решение:

x - сколько сейчас бабушке лет.

12 - сколько сейчас внучке лет

x + 3 = (12 + 3) * 4\\x + 3 = 48 + 12\\x = 48 + 12 - 3\\x = 57

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