Предмет: Алгебра, автор: viktoriamaksimova287

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Автор ответа: anel7776

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Объяснение:

$\left \{ {{2x+y=8} \atop {2x-y=1}} \right.\\4x=9\\x=2.25\\$

$2*2.25-y=1\\4.5-y=1\\-y=-3.5\\y=3.5$

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