
The inequality is
.
Apply multiplication property of inequality: Multiply each side by 3.
\
(Multiply:
)
(Cancel common terms)
Apply multiplication property of inequality:
\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: A dot means that this point is included in the solution set.
The solution set is
.
The graph is
\