$\"\"$

The expression is $\"\"$ \ \

Division property of equality: If $\"\"$ then $\"\"$ , $\"\"$ .

$\"\"$ (Divide each side by negative 7)

$\"\"$ (Cancel common terms)

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

Check:

Substitutive the value $\"\"$ on original equation

$\"\"$

$\"\"$ (Two same signs is positive) \ \

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

The solution $\"\"$