Answer:
if 
 then no solution, but if
 then no solution, but if 
 then the answer is
 then the answer is 

Explanation:
it depends if its a common logarithm or of ot a logarithm of a base of 8. normally, a common logarithm would look like 
 or it will look like
 or it will look like 
 . the 10 does not need to be visible to be a common logarithm. if the function is base 8 like i suspect then it will look like
. the 10 does not need to be visible to be a common logarithm. if the function is base 8 like i suspect then it will look like
 . the inverse of a logarithmic function is an exponential function. sorry if that made your brain hurt.
. the inverse of a logarithmic function is an exponential function. sorry if that made your brain hurt.