$\"\"$ $\"\"$ $\"\"$ $\"\"$

\

According to Means-extremes Property of proportion: If $\"\"$ ,

\

then $\"\"$ .

\

$\"\"$ (Cross products)

\

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

\

$\"\"$ (Distributive property: $\"\"$ ) $\"\"$

\

According to addition property of equality: Add 16 to each side.

\

$\"\"$

\

$\"\"$ (Additive inverse property: $\"\"$ )

\

$\"\"$ (Additive identity property: $\"\"$ )

\

$\"\"$ (Add: $\"\"$ ) $\"\"$

\

$\"\"$ (Divide each side by nagative 9)

\

$\"\"$ (Cancel common terms)

\

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

\

The value of $\"\"$ .