Предмет: Математика, автор: aslanli54

Сделайте 879 номер обе заданий!!
Плииз

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Ответы

Автор ответа: Water2019
0

Ответ:

х-вторая сторона

2х-первая сторона

х+7-третья сторона

х+2х+х+7=99

4х=99-7

4х=92

х=23дм вторая сторона

23*2=46дм первая сторона

23+7=30дм третья сторона

23+46+30=99 дм

Пошаговое объяснение:


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