The equations are

Since the coefficients of the y-terms,+1and +1,are same,

you can eliminate these terms by subtracting the equations. .

Subtract the equations to eliminate variable y.

        (Write the equations in column form and add)

Now Substitute  for x  in either equation to find the value of y.

   (Equation 1)

                                    (Multiply:  )

                                          (Additive indentity property: )

The solution is .

The solution is .