$\"\"$ $\"\"$

The inequality is $\"\"$

Apply division property of inequality: Divide each side by 3.

$\"\"$

$\"\"$ (Cancel common terms)

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

Graph the solution set on a number line.

$\"number$

Note: A dot means that this point 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 inequality solution is $\"\"$ .