Question

Решите систему
x+y+z=5
2x-y+2z=4
3x-2y-z=1

Answer 1

x+y+z=5
-2x+y-2z=-4
3x-2y-z=1;
2x-2z=2
2 (x-z)=2;
6x+6y+6z=30
2x-y+2z =4
3x-2y-z=1
9y-5z=25;
2x-2z=2
9y-5z =25
10x-10z=10
18y-10z=50;