Solve by matrix method :
`2x+y=5`
`x-y = 1`

Explanation

To solve the system of equations using the matrix method, we will follow these steps:

### Step 1: Write the equations in matrix form
We start with the given equations:
1. \( 2x + y = 5 \) (Equation 1)
2. \( x - y = 1 \) (Equation 2)

We can express these equations in the matrix form \( Ax = b \), where:
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