$\"subtraction$ $\"\"$

\

The inequality is $\"\"$

\

Apply subtraction property of inequality: Subtract 20 from each side.

\

$\"\"$

\

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

\

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

\

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

\

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

\

Note: A circle means that this point is not included in the solution set. $\"\"$

\

Check:-

\

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

\

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

\

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

\

The inequality is true. $\"\"$

\

The inequality solution is $\"\"$ .