The inequality is .

Apply addition property of inequality: Add 6 to each side.

            (Apply additive inverse property: )

                  (Apply 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 19 in

                        (Substitute )

                              (Subtract: )

The inequality is true.

The inequality solution is .