The inequality .

Apply addition property of inequality: Add 4 to each side.

             (Additive inverse property:  )

                   (Additive identity property:  )

                          (Add:  )

Graph the solution set on a number line.

Note: A circle means that this point is not included in the solution set.

Check:

To check, substitute a number less than   in   .

                    (Substitute  )

                           (Add:  )

The inequality is true.

The inequality solution is .