Предмет: Алгебра, автор: dasha2202047

Помогите пожалуйста срочно!!!

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Автор ответа: KozhanovaVer

в первом метод Гаусса,во втором за правилом Крамера

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KozhanovaVer: можно звание "лучший ответ", пожалуйста

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