Question

файл прикрепил, даю 50 балов, срочно!
Со всеми решениями

Answer 1

$1)\; \; \left\{\begin{array}{l}2x-5y=6\\4x+5y=24\end{array}\right\; \oplus \; \left\{\begin{array}{l}5y=2x-6\\6x=30\end{array}\right\; \; \left\{\begin{array}{l}5y=4\\x=5\end{array}\right\; \; \left\{\begin{array}{ccc}y=0,8\\x=5\end{array}\right$

$2)\; \; \left\{\begin{array}{l}5x-3y=11\; |\cdot 2\\2x-4y=3\; |\cdot (-5)\end{array}\right\; \oplus \; \left\{\begin{array}{l}14y=7\\2x=4y+3\end{array}\right\; \; \left\{\begin{array}{l}y=0,5\\2x=5\end{array}\right\; \left\{\begin{array}{l}y=0,5\\x=2,5\end{array}\right$

$3)\; \; \left\{\begin{array}{l}6x+y=10\\6x-3y=-26\end{array}\right\; \ominus \; \left\{\begin{array}{l}4y=36\\6x=3y-26\end{array}\right\; \; \left\{\begin{array}{l}y=9\\6x=1\end{array}\right\; \left\{\begin{array}{ccc}y=9\\x=\frac{1}{6} \end{array}\right$