The inequality is

Apply division property of inequality: Divide each side by 6.

               (Cancel common terms)

                    (Divide: )

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

                   (Product of two same signs is positive)

Graph the solution set on a number line.

Note: A dot means that this point is included in the solution set.

Check:

To check, substitute a number less than or equal to   in .

       (Substitute )

                  (Multiply: )

The inequality is true.

The inequality solution set is .