The expression is  .
   .
Case 1: If a  b Then
 b Then
 
                                             
Case 2: If  a
a  b Then
 b Then
 
                                             
 (Multiply each side by negative one and flip the symbol)
 (Multiply each side by negative one and flip the symbol)
 (Product of two same signs is positive)
                                                           (Product of two same signs is positive)
Solve equation for case 1.
\ 
                                             
Apply addition property of inequality: Add 3 to each side.
\ \ \
 \ \
 (Apply additive inverse property:
                                                               (Apply additive inverse property:  )
)
 (Add:
                                                                                                                (Add:  )
                                                                                                                        )
Apply division property of inequality: Divide each side by 2.
\
 (Cancel common terms)
                       (Cancel common terms)
 (Divide:
                            (Divide:  )
)
Solve equation for case 2.
\ 
                                 
Apply addition property of inequality: Add 3 to each side.
\
 (Apply additive inverse property:
                             (Apply additive inverse property:  )
)
 (Add:
                                    (Add:  )
                                    )
Apply division property of inequality: Divide each side by 2.
\
 (Cancel common terms)
                                                  (Cancel common terms)
 (Divide:
                                                     (Divide: )
                                                             )
Graph the solution set on a number line.
\
Note: A dot means that this point is included in the solution set.
The solution set is  .
.