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

The equation is $\"\"$ .

$\"\"$ (Evaluate powers: $\"\"$ )

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

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

$\"\"$

According to division property of equality: if $\"\"$ , then $\"\"$ .

$\"\"$ (Divide each side by 5)

$\"\"$ (Cancel common terms)

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

The value of $\"\"$ .