Răspuns:
2x+y=5
z-3t=4
-2z+t=1
x-y=3
x=3+y
2(3+y)+y=5
6+2y+y=5
3y=-1
y=-1/3
x+1/3=3
x=3+1/3=9/3-1/3=8/3
t=1+2z
z-3+6z=4
7z=7
z=1
1-3t=4
-3t=3
t=-1