The inequality is .

Apply addition property of inequality: If then .

                      (Add 5 to each side)

                            (Apply additive inverse property: )

                                  (Apply additive identity property: )

                                        (Add: )

Graph the solution set on a number line.

Note: A dot means that this point is included in the solution set.

Check:

To check the solution, substitute a number less than  or equal to 7 in

                                  (Substitute )

                                        (Subtract: )

The inequality  is true.

The inequality solution set is .