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

The equation is $\"\"$ .

$\"\"$ (Divide: $\"\"$ )

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

$\"\"$ (Commutative property: a $\"\"$ b = b $\"\"$ a)

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

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

The value of $\"\"$ .