Предмет: Алгебра, автор: varapayeva2006

Решите пожалуйста 4 и 5 номер

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Ответы

Автор ответа: lizok7334

Объяснение:

4. х-3у=5,

4х-12у=25;

х=5+3у,

4*(5+3у)-12у=25;

х=5+3у,

20+12у-12у=25;

х=5+3у,

20=25. =>у не имеет корней∅

(х;у)€ ∅

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