$\"\"$

The inequality is $\"\"$ .

Apply addition property of inequality: Add 9.3 to each side.

$\"\"$

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

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

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

Graph the solution set on a number line.

$\"Graph_of_the_number_line_inquality_d_greater_than_or_equal_to_21.8\"$

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

Check:To check, substitute a number greater than or equal to 21.8 in $\"\"$ .

$\"\"$

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

The inequality is true. $\"\"$

The inequality solution is $\"\"$ .