step 1...add (-2x-y+z=-3) tu (+2x+3y+3z=5)...yu get 2y+4z=2
step 2...add (-2x+2y+3z=0) tu (+2x+3y+3z=5)...get 5y+6z=5
step 3... konvert em 2 thangs tu (10y+20z=10) & (10y+12z=10)...subtrakt & get (20z-12z)=0
or 8z=0...z=0
then 2y+4z=2 become 2y=2, so y=1
2x+3y+3z=5 become 2x+3+0=5, so 2x=5-3=2, so x=1