$\"\"$

The inequality is $\"\"$

Apply division property of inequality: $\"\"$ .

$\"\"$ (Divide each side by 3)

$\"\"$ (Cancel common terms)

$\"\"$ (Divide: $\"\"$ ) $\"\"$

The solution set is $\"\"$ .

Graph the solution set on a number line. $\"number$

Note: The point indicated with closed circle is included in the solution set. $\"\"$

Check:

To check, substitute a number greater than or equal to 7 in $\"\"$ .

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Multiply: $\"\"$ )

The inequality is true. $\"\"$

The graph of $\"\"$ is

$\"number$

The inequality solution set is $\"\"$ .