The equations are

Since the coefficients of the y-terms,+1 and -1, 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 5.

                      (Cancel common terms)

                           (Divide: )

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

(Equation 1)

                   (Multiply:  )

Apply addition property of equality: Add 27 to each side.

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

                (Apply additive inverse property: )

                       (Apply additive identity property: )

                             (Add:  )

The solution is .

The solution is .