The logarithmic equation is $\"\"$ .

Apply exponential property of logarithm : $\"image\"$ , $\"\"$ .

$\"\"$

Apply formula : 1/a^b = a^{- b}

$\"\"$

Apply exponential property of logarithm : $\"image\"$ , $\"\"$ .

$\"\"$

$\"\"$ .

The solution is $\"\"$ .