Given equation is .

  (Add 7 to each side)

        (Apply additive inverse property: )

              (Apply additive identity property: )

                  (Add: )

              (Divide each side by  4)

                   (Cancel common terms)

                         (Divide: )

Check the solution:

To Check, substitute  in .

             (Substitute )

                  (Multiply: )

                          (Subtract: )

The solution  is true.

The value of .