Решите систему уравнений.8х-2y=149x+4y=-33y-z=55y+2z=12

Решите задачу:

$\left \{ {{8x-2y=14|2} \atop {9x+4y=-3}} \right.$

$\left \{ {{16x-4y=28} \atop {9x+4y=-3}} \right.$

$\left \{ {{16x-4y=28} \atop {25x=25}} \right.$

$\left \{ {{-4y=12} \atop {x=1}} \right.$

$\left \{ {{y=-3} \atop {x=1}} \right.$

$\left \{ {{3y-z=5|2} \atop {5y+2z=12}} \right.$

$\left \{ {{6y-2z=10} \atop {5y+2z=12}} \right.$

$\left \{ {{6y-2z=10} \atop {11y=22}} \right.$

$\left \{ {{-2z=-2} \atop {y=2}} \right.$

$\left \{ {{z=1} \atop {y=2}} \right.$