Question

ПОМОГИТЕ СРОЧНО!!! Алгебра. 167 номер

Answer 1

$1)\; \; \left\{\begin{array}{c}x+2y-3z=-1\\2x-y+4z=3\\3x+6y-9z=5\end{array}\right \; net\; reshenij\\\\\\2)\; \; \left\{\begin{array}{c}x+2y-3z=-1\\2x-y+4z=3\\3x+6y-9z=-3\end{array}\right \; \; beskonechno\; \; mnogo \; \; reshenij\\\\\\3)\; \; \left\{\begin{array}{c}x+2y-3z=-1\\2x-y+4z=3\\x-3y-6z=5\end{array}\right\; \; \to \; \; x=2\; ,\; y=-3\; ,\; z=-1\; .$