$\"\"$

The equation is $\"\"$ .

Apply division proparty of equelity: Divide each each by negative 3.

$\"\"$

$\"\"$ (Cancel common terms)

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

$\"\"$

Check :

To, check, substitute $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ (Multiply: $\"\"$ )

The equation is true.

$\"\"$

The value of $\"\"$ .