Question

{URGENT}

Please solve the system of equations, WITH STEP-BY-STEP I don't understand it, and have no way of contacting the teacher for help (emails are closed today)

Answer 1

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

4x - 6 - z = -18

4x - z = -12

3x - 2 - 4z = -24

3x - 4z = -22

4x - z = -12

3x - 4z = -22

-16x + 4z = 48

3x - 4z = -22

-13x = 26

x = -2

-5(-2) + 3(-1) + 2z = 15

10 - 3 + 2z = 15

7 + 2z = 15

2z = 8

z = 4

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