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

The equation is $\"\"$ .

Apply addition property of equality: Add 2n to each side.

$\"\"$

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

$\"\"$

Apply division property of equality: Divide each side by 4.

$\"\"$

$\"\"$ (Cancel common terms) $\"\"$

The solution is $\"\"$ .