The inequality is .

Apply subtraction property of inequality: Subtract 8 from each side.

           (Apply additive inverse property:  )

                  (Apply additive identity property:  )

                           (Subtract: )

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 greater than or equal to 4, in .

                   (Substitute )

                       (Add: )

The inequality is true.

The inequality solution set is .