Question

помогите пжпжпжпж оч срочно

Answer 1

$\displaystyle \left \{ {{\frac{z+m}{9}-\frac{z-m}{3}=2 } \atop {\frac{2z-m}{6}-\frac{3z+2m}{3}=-20 } \right.\\ \\\left \{ {{x=-9+2m} \atop {\frac{2z-m}{6}-\frac{3z+2m}{3}=-20 }} \right.\\ \\\frac{2(-9+2m)-m}{6}-\frac{3(-9+2m)+2m}{3}=-20\\ \\m=12\\ z=-9+2*12\\z=15\\(m,z)=(12,15)$