The inequality is .

Apply subtraction property of inequality: Substract 11 from each side.

         (Apply commutative property of addition: )

                    (Apply additive inverse property:  )

                               (Substract: )

                                      (Apply additive identity property:  )

Graph the solution set on a number lin.

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 is .