$\"\"$

The inequality is $\"\"$ .

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

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

$\"\"$ (Apply commutative property: $\"\"$ )

$\"\"$ (Apply additive inverse property: $\"\"$ )

$\"\"$ (Apply additive identity property: $\"\"$ )

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

Check:

To check, substitute 30, a number greater than 29, in $\"\"$ .

$\"\"$

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

The inequality solution is $\"\"$ .