Solve the following equations by reduction method : `x - y + z = 4, 2x + y - 3z = 0 , x + y + z = 2`

Explanation

To solve the given equations using the reduction method, we will follow these steps:

### Given Equations:
1. \( x - y + z = 4 \) (Equation 1)
2. \( 2x + y - 3z = 0 \) (Equation 2)
3. \( x + y + z = 2 \) (Equation 3)

### Step 1: Write the equations in matrix form
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