$\"\"$

If $\"\"$ is a real number then the inverse property of logarithm $\"\"$ .

$\"\"$

The logarithmic function is $\"\"$ .

Rewrite the above equation as $\"\"$ .

Apply the above property of logarithm to $\"\"$ .

Substitute $\"\"$ in $\"\"$ .

$\"\"$ .

Thus, the value of logarithmic expression $\"\"$ is 7.

$\"\"$

The value of logarithmic expression $\"\"$ is 7.