Respuesta :

meredith48034

Answer:

Step-by-step explanation:

8x + 12y - 2z = -36

-5x + 3y + 2z= 15

3x + 15y = -21

3x + 2y - 4z = -24

-10x + 6y + 4z = 30

-7x + 8y = 6

3x + 15y = -21

-21x + 24y = 18

 21x + 105y = -147

129y = -129

y = -1

3x - 15 = -21

3x = -6

x = -2

-8  - 6 - z = -18

-14 - z = -18

-z = -4

z = 4

x = -2, y = -1, z = 4