Предмет: Математика, автор: Ару870

решитееееееееееееееееее

Приложения:

Ответы

Автор ответа: Dianulya7

А.
х+2х=21,42
3х=21,42
х=21,42:3
х=7,14
Ответ: х=14.

С.
2х+5х=42,7
7х=42,7
х=42,7:7
х=6,1
Ответ: х=6,1.

Н.
12х-3х=41,4
9х=41,4
х=41,4:9
х=4,6
Ответ: х=4,6.

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