The inequality is

Apply multiplication property of inequality: Multiply each side by 2.

                (Cancel common terms)

                  (Multiply: )   (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 circle means that this point is not included in the solution set.

Check:

To check, substitute a number greater than 16  in inequality .

                 (Substitute )

                    (Divide: )

The inequality is true.

The inequality solution set is .