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

The inequality is $\"\"$ .

Apply addition property of inequality: Add 4 to each side.

$\"\"$

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

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

$\"\"$ (Add: 1.4 + 4 = 5.4) $\"\"$

Check:

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

$\"\"$ (Substitute f = $\"\"$ )

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

The inequality is true. $\"\"$

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