The inequality is 
Apply multiplication property of inequality:
.
(Multiply each side by 2)
(Cancel common terms)
(Multiply:
)
Multiply each side by negative one and flip the symbol
\
(Product of two same signs is positive)
The solution set is
.
Graph the solution set on a number line.
Note: The point indicated with open circle is not included in the solution set.
Check:
\To check, substitute a number greater than 16 in the inequality
.
(Substitute
)
(Divide:
)
The inequality is true.
The graph of
is

The inequality solution set is
.