$\"\"$

The equation is $\"\"$

Apply division property of equality: Divide each side by negative 0.4.

$\"\"$

$\"\"$ (Cancel common terms)

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

To check the solution, substitute $\"\"$ in original equation.

$\"\"$

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

The equation is true. $\"\"$

The value is $\"\"$ .