Предмет: Алгебра, автор: aminaliev2346

помогите пожалуйста, номер: 2,3,4

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Автор ответа: egomessi2006

0

3)a)2xy+7xy+3xy=12xy
б)13x4y5z-9x4y5z-x4y5z=3x4y5z

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