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)

The solution set is .

Graph the solution set on a number line.

Note: The point indicated with closed circle 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 graph of is

The inequality solution set is .