The equations are

Since the coefficients of the y-terms, -5 and +5, are additive inverses,

you can eliminate these terms by adding the equations. .

add the equations to eliminate variable y.

       (Write the equations in column form and add)

Apply division property of equality: Divide each side by negative 7.

                                (Cancel common terms)

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

   (Equation 1)

                        (Multiply:  )

           (Subtract 3 from each side)

Apply commutative property of addition: a + b = b + a.

                 (Apply additive inverse property: )

                    (Apply additive identity property: )

                        (Subtract:  )

Apply division property of equality: Divide each side by negative 5.

                               (Cancel common terms)

                                    (Divide: )

The solution is .

The solution is .