The inequality .

Apply addition property of inequality:  Add 6.7 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, substitute a number less than or equal to  8.8 in  .

               (Substitute  )

                         (Subtract:   )

The inequality is true.

The inequality solution is .