Решите систему уравнений x+y-z=2 x-y+2z=3 x-2y+z=1
Z=x+y-2 x-y+2*(x+y-2)=3 x-y+2*x+2*y-4=3 3*x+y=7 y=7-3*x x-2*y+x+y-2=1 2*x-y=3 2*x-(7-3*x)=3 2*x-7+3*x=3 5*x=10 x=2 y=7-3*2=1 z=2+1-2=1