Предмет: Математика, автор: galicevaanna15

Решите систему уравнений

x+y=10x+4y=-5

СРОЧНО НУЖНО!!!!!!

galicevaanna15: вот это решите а то то полностью не вписалось

galicevaanna15: {х+у=10 {х+4у=-5

Ответы

Автор ответа: NNNLLL54

0

Ответ:

$\left\{\begin{array}{l}x+y=10\\x+4y=-5\end{array}\right\ \ominus \ \left\{\begin{array}{l}y-4y=10+5\\x=-4y-5\end{array}\right\ \ \left\{\begin{array}{l}-3y=15\\x=-4y-5\end{array}\right\ \ \left\{\begin{array}{l}y=-5\\x=15\end{array}\right\\\\\\Otvet:\ \ (15;-5)\ .$

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