Elimination Method:

The equations are

              Equation (1)

            Equation (2)

Since the coefficients of the x-terms additive inverses, you can eliminate these

terms by adding the equations. Add the equations to eliminate variable x.

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

                           (Multiply each side by negative one)

              (Product of two same signs is positive)

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

              (Equation 2)

                    (Multiply: )

        (Add 6 to each side)

              (Apply additive inverse property: )

                    (Apply additive identity property: )

                            (Add: )

                       (Divide each side by 4).

                              (Cancel common terms)

The solution is .