Elimination Method:

The equations are

       Equation (1)

               Equation (2)

Since the coefficients of b-terms are additive inverses, these terms can be

elimanted by adding equations.

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

According to division property of equality: Divide each side by 3.

                                     (Cancel common terms).

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

                   (Equation 1).

                        (Product of two different signs is negative)

According to addition property of equality: Add 2 to each side.

            (Apply commutative property of addition: )

                    (Apply additive inverse property: )

                       (Apply additive identity property: )

                                (Add: )

According to division property of equality: Divide each side by 3.

                                  (Cancel common terms)

                     (Multiply each side by negative one)

                                        (Product of two same signs is positive)

The solution is .