
The inequality is 
(Subtract 4z from each side)
(Apply Commutative property:
)
(Apply Additive inverse property:
)
(Apply Additive identity property:
)
(Subtract:
)
(Subtract 2 from each side)
(Subtract:
)
(Apply Additive inverse property:
)
(Apply Additive identity property:
)
(Cancel common terms)
(Divide:
)
The solution set is 
Graph the solution set on a number line.
Note: A circle means that this point is not included in the solution set.
The solution set is
.
The graph is
\\

\
\