### Matrix Method: Problems

1. 4x + 4y + 4z = 12

x + 5y + 6z = -16

3x + y + z = 17

2. 4x + y + 4z = 36

3x + 4y + z = 24

1000x + 3y + 2z = 28

3. 2x + 6y + z = 16

-x – 4y + 6z = 18

x + y + z = 10

4. 3x + 4y – z = 1

-2x + y + z = 3

12x + 12y + 12z = 0

5. 2x – y + z = 17

1/2x + 2y – z = 10

-x + 5y – z = 1

6. 2x + 2y + 2z = 13

4x + y – z = 0

-2x + 4y – z = 3

7. 5/2x + 1/3y – 3/2z = 0

2x + 3y – z = 9

-2x + y + 2z = 7

8. 2x + y + z = 49

3x – z = 0

2x – y = 0

9. 23x + y + z = 6

46x + 2y – z = 3

69x – y – 2z = -5

10. 2x + y – z = 15

-2x – y + z = -5

7x + 2y + 2z = -4

11. 2x + 3y – z = 25

x + 4y + z = 25

x – 6y + 5z = 25

12. -2x + 2y + 2z = 120

3x + 3/4y + 3/5z = 150

1/3x + 1/4y + 1/5z = 30

13. 2x + y – z = 12

x + 2y – 2z = 6

3x – y + 4z = 36

1. x = 7, y = 1, z = -3
2. x = 0, y = 4, z = 8
3. x = 6, y = 0, z = 4
4. x = -1, y = 1, z = 0
5. x = 10, y = 2, z = -1
6. x = 1/2, y = 2, z = 4
7. x = 2, y = 3, z = 4
8. x = 7, y = 14, z = 21
9. x = 1/23, y = 2, z = 3
10. x = 2, y = 1, z = -10
11. x = 12, y = 2, z = 5
12. x = 30, y = 40, z = 50
13. x = 6, y = 6, z = 6
Edzai Conilias Zvobwo is an Executive Data Science Coach, Machine Learning/Data Science Practitioner, Author, Responsible AI Activist and STEM Education promoter. His experience spans across many industry and has advised C-Suite executives for Fortune 100 companies around data-informed transformation.