Предмет: Математика, автор: osemein

Срочно помогите пожалуйста

Приложения:

Ответы

Автор ответа: Esportsarena

на 1 -x

на 2-x+30

на 3-2х

сост и реш ур-е

х+х+30+2х=110

4х+30=110

4х=80

х=20

Ответ: на 1 20, на 2 50,на 3 40

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