$\"\"$

The expression is $\"\"$

Apply to addition proparty of equality: If a = b then a + c = b + c.

$\"\"$

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

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

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

The value of $\"\"$ .