Предмет: Алгебра, автор: роьамор

-х-9у=33 9у-х=-21 Решите системой,пожалуйста,буду очень благодарна)

Ответы

Автор ответа: Андрей0880

-х-9у=33
-х+9у=-21
2х=12
х=6

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