$\"\"$

The equation is $\"\"$ .

Solve the equation.

$\"\"$ (Original equation)

$\"\"$ (Logarithm formula: $\"\"$ if and only if $\"\"$ )

$\"\"$ (Substitute: $\"\"$ )

$\"\"$ (Definition of negative exponents: $\"\"$ )

Equality for exponential functions property: $\"\"$ if and only if $\"\"$ .

$\"\"$

The value of $\"\"$ is $\"\"$ .