8(3^((-4)x)=40

Question

Solve the fallowing equations. 

8(3^-4x)=40

Answer 1

8 ( 3^-4X ) = 40

divide both sides by 8

3 ^{-4x  = 5} 

 

 - 4X  log 3 = log 5

 

   X = log 5 

         -4log3 

 

   X = - 0.36624338