The inequality is .

Apply subtraction property of inequality: Subtract 18 from each side.

  (Apply commutative property of addition: )

            (Apply additive inverse property:  )

                  (Apply additive identity property: )

                            (Subtract: )

Apply division property of inequality: Divide each side by 2.

                            (Cancel common terms)

                               (Divide: )

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  3 in .

              (Substitute )

                    (Multiply: )

                          (Add: )

The inequality is true.

The inequality solution set is .