The inequality is .

Apply subtraction property of inequality: Subtract 6 from each side.

              (Apply additive inverse property: )

                    (Apply additive identity property: )

                           (Substrat: )

Apply division property of inequality: Divide each side by 3.

                          (Cancel common terms)

                             (Divide: )

               (Multiply each side by negative one and flip the symbol)

                                   (product of two same signs is positive)

Check:

To check, a number greater than or equal to 3, in .

                (Substitute )

                      (Multiply: )

                            (Add: )

The inequality is true.

The inequality solution set is .