$\"\"$

The expression is $\"\"$ .

Division property of equality: $\"\"$ .

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

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

$\"\"$

Check:

Check the solution by substituting $\"\"$ in the original equation.

$\"\"$

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

$\"\"$

The value of $\"\"$ .