**Problem : **
Solve the following system using matrices and row reduction:

2(x-y+ 3z= - 15

x+ 2y-z= 15

2x- 3y- 3z= 7

**Problem : **
Solve the following system using matrices and row reduction:

2(x+ 2y- 5z= - 9

5x- 2y+z= 4

7x+ 4y- 4z= 3

**Problem : **
Solve the following system using matrices and row reduction:

2(x+y+z= - 11

-3x-y+ 2z= - 1

x+ 2y-z= 2

**Problem : **
Solve the following system using matrices and row reduction:

5(x+y+z= 5

2x+ 2y+ 2z= - 6

3x-y+ 4z= - 9

**Problem : **
Solve the following system using matrices and row reduction:

(x- 2y-z= 0

2x+y- 3z= 7

-3x-y+ 4z= - 11