**Problem : **
Solve the following system using the Addition/Subtraction method:

2(x+y+ 3z= 10

-3x- 2y+ 7z= 5

3x+ 3y- 4z= 7

**Problem : **
Solve the following system using the Addition/Subtraction method:

(x+y- 2z= 5

2x+ 3y+ 4z= 18

-x- 2y- 6z= - 13

**Problem : **
Solve the following system using the Addition/Subtraction method:

3(x+ 2y= 7

-4x+ 3z= - 6

-2y- 6z= - 10

**Problem : **
Solve the following system using the Addition/Subtraction method:

4(x+ 2y- 5z= - 21

2x- 2y+z= 7

4x+ 3y-z= - 1

**Problem : **
Solve the following system using the Addition/Subtraction method:

(x+y+z= 5

2x+ 2y+ 3z= 14

2x- 3y+ 2z= - 5