The system of equations are .

The first equation: .

Subtract 2x from each side.

.

The second equation: .

Subtract 4x from each side.

.

The system of equations are rewrite as .

To write the augmented matrix,

Place the coefficients of the equations and the constant terms into matrix.

.

To make the first element in the first () row a 1, multiply the first row () by .

   (The result is placed in row 1)

To make the first element in the second () row a 0, multiply the first row () by 4 and add the result to row 2 ().

(The result is placed in row 2)

To make the second element in the second () row a 1, multiply the second () row by negative 1.

     (The result is placed in row 2)

To make the second element in the first () row a 0, multiply the second row () by and add the result to row 1().

      (The result is placed in row 1)

The first row will give you the solution for .

The second row will give you the solution for .

The solution is  .