The equation is

Apply Addition property of inequality: Add 4.2 to each side.

                                     (Additive inverse property: )

                                             (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, substitute10.7, a number and less than 11.7, in .

                                         (Substitute )

                                                                      (Subtract : )

The inequality is true

The inequality solution is .