$\"\"$

The equation is $\"\"$ .

Solve the equation for $\"\"$ .

$\"\"$ (Original equation)

$\"\"$ (Subtract $\"\"$ and $\"\"$ from each side)

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

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

$\"\"$ (Cancel common terms)

Therefore, the formula for the $\"\"$ is $\"\"$ .

$\"\"$

$\"\"$ .