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qwerty231111
@qwerty231111
May 2022
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Яка з пар чисел э розв язком системи ривнянь
{x+y=7;{2x-y=11;
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[tex]x + y = 7 \\ 2x - y = 11[/tex]Складываем[tex]3x = 18 \\ x = 18 \div 3 \\ x = 6 \\ \\ x + y = 7 \\ 6 + y = 7 \\ y = 7 - 6 \\ y = 1[/tex]Ответ : (6 ; 1)
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