$\"\"$

The inequality is $\"\"$ .

Consider $\"\"$ .

Add 1 to each side.

$\"\"$

Divide each side by 3.

$\"\"$ .

The solution interval : $\"\"$ .

The graph is :

$\"graph$

Note : A closed circle means $\"\"$ is included in the solution set. \ \

$\"\"$

The graph of inequality $\"\"$ is : $\"graph$