$\"\"$

\

The equation is $\"\"$ .

\

Rewrite the original equation $\"\"$ .

\

Apply cross product property: $\"\"$ .

\

$\"\"$

\

$\"\"$

\

Distribute terms using distributive property: $\"\"$ .

\

$\"\"$

\

$\"\"$

\

Apply subtraction property of equality: If a = b then $\"\"$ .

\

Subtract $\"\"$ from each side.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Subtract 18 from each side.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Divide each side by 6.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

The value of $\"\"$ .