x+y-z=0,
8x-3y+z=14,
2x-y+z=6
Δ=
1 1 - 1
8 -3 1
2 -1 1=
-3+2+8-(6+8-1)=7-13=-6
Δх=
0 1 -1
14 -3 1
6 -1 1=
6+14-(18+14)=20-32=-12
Δу=
1 0 -1
8 14 1
2 6 1=
14-48-(-28+6)=-34+22=-12
Δz=
1 1 0
8 -3 14
2 -1 6=
-18+28-(48-14)=10-34=-24
х=Δх/Δ=-12/(-6)=2
у=Δу/Δ=-12/(-6)=2
z=Δz/Δ=-24/(-6)=4
ответ х=2; у=2; z=4.
x+y-z=0,
8x-3y+z=14,
2x-y+z=6
Δ=
1 1 - 1
8 -3 1
2 -1 1=
-3+2+8-(6+8-1)=7-13=-6
Δх=
0 1 -1
14 -3 1
6 -1 1=
6+14-(18+14)=20-32=-12
Δу=
1 0 -1
8 14 1
2 6 1=
14-48-(-28+6)=-34+22=-12
Δz=
1 1 0
8 -3 14
2 -1 6=
-18+28-(48-14)=10-34=-24
х=Δх/Δ=-12/(-6)=2
у=Δу/Δ=-12/(-6)=2
z=Δz/Δ=-24/(-6)=4
ответ х=2; у=2; z=4.