The original function is

Write as or

First solve the case .

Apply Addition property of equality: if a = b, then a - c = b - c.

                   (Add 3 to each side)

                         (Additive inerse property: )

                               (Additive identity property: ) 

                                     (Add: )

                                 (Divide each side by 2)

                                      (Cancel common terms)

                                        (Divide: )

Next solve the case .

               (Add 3 to each side)

                     (Additive inerse property: )

                           (Additive identity property: ) 

                                 (Add: )

                             (Divide each side by 2)

                                  (Cancel common terms)

                                      (Divide: )

First, draw a number line.

To graph the solutions set, mark the numbers –7 and 10 on number line.

The solution set is .