Предмет: Алгебра, автор: xep2281

Help!
Очень надо
Заранее спасибо

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Автор ответа: Рудутф144

3

1
4х - у=1
у=1-4х
5х+3(1-4х)-14
5х+3-12х-14
-7х+3-14
-7х= 11

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