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

The inequality is $\"\"$ .

Apply addition property of inequality: Add 9 to each side.

$\"\"$

$\"\"$ (Additive inverse property: $\"\"$ )

$\"\"$ (Additive identity property: $\"\"$ )

$\"\"$ (Add: $\"\"$ )

$\"\"$

Graph the solution set on a number line

$\"\"$

Check:

To check, substitute 10, a number less than 10, in $\"\"$ .

$\"\"$

$\"\"$ (Substract: $\"\"$ )

$\"\"$

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