$\"\"$

The expression is $\"\"$ .

Multiplication property of equality:

$\"\"$ .

$\"\"$ (Multiply each side by -0.5)

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

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

$\"\"$

Check:

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

$\"\"$

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

$\"\"$

The value of $\"\"$ .