The equation is .

       (Add 3 to each side)

             (Apply Additive inverse property: )

                   (Apply Additive identity property: )

                         (Add: )

                    (Divide each side by 2)

                         (Cancel common terms)

                              (Divide: )

                    (Take square root to each side)

                  (Write: 9 as )

                            (Cancel squares and roots)

The value of h is .