The inequality is .

Apply subtraction property of inequality: Subtract 4 from each side.

                    (Apply additive inverse property: )

                           (Apply additive identity property: )

                                 (Subtract: )

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 less than 1, in .

                       (Substitute )

                                 (Add: )

The inequality is true.

The inequality solution set is .