Question

X+2y+4z=5
2x-2y+z=8
3x-3y-z=7

Answer 1

Explicação passo-a-passo:

D = 2 + 6 - 24 + 24 + 3 + 4

D = 15

5 2 4

8 -2 1

7 -3 -1

Dx = 10 + 14 - 96 + 56 + 15 + 16

x = Dx/D = 1

1 5 4

2 8 1

3 7 -1

Dy = -8 + 15 + 56 - 96 - 7 + 10

y = Dy/D = -2

1 2 5

2 -2 8

3 -3 7

Dz = -14 + 48 - 30 + 30 + 24 - 28

z = Dz/D = 2