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

The given funtion is $\"\"$ and $\"\"$

Compare the above two equations.

We get,

$\"\"$

$\"\"$ (Subtract 9 from each side) \ \

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

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

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

$\"\"$ (Multiply each side by negative one)

$\"\"$ (Product of two same signs is positive) \ \ $\"\"$

The value of $\"\"$ .