Предмет: Математика, автор: Arinka1236228

21:х=3:7
ПОМОГИТЕ ПОДАЛУЙСТА СРОЧНО

Ответы

Автор ответа: alikbelyj438
1

Ответ:х=49

Пошаговое объяснение:

Автор ответа: ildar502020
1

Ответ:    49.

Пошаговое объяснение:

21:х=3:7 - это пропорция  

Равенство двух отношений наз. пропорцией.

x=21*7/3;

x=7*7;

x=49.

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