$\"\"$

The expression is $\"\"$

Apply Additive identity property: For any number $\"\"$ , the sum of $\"\"$ and 0 is $\"\"$ . $\"\"$

$\"\"$ , Since $\"\"$ . The property used is the Additive identity. $\"\"$

The value of $\"\"$ is $\"\"$ .

The property used is the additive identity.