Elimination Method:

The equations are

                                Equation (1)

                              Equation (2)

Since the coefficients of the x-terms are additive inverses, you can eliminate these terms by subtracting the equations. Subtract the equations to eliminate variable x.

Write the equations in column form and subtract the corresponding columns.

Now, find the x value by substituting  in either equation.

              (Equation 1)

Subtract 7 from each side.

The solution is .