Correct way to do this:

2 - log x = log 5

2 = log 5 + log x

2 = log (5x)

 ------- Converting to EXPONENTIAL form

5x = 100

 

Answer by greenestamps(13215)   (Show Source): You can put this solution on YOUR website!
 


There are MANY correct ways to work this problem.


I would definitely not use the method shown by tutor josgarithmetic, since it involves finding a numerical approximation of a logarithm.


The method shown by the other tutor is fine...


I would be inclined to rewrite the equation with every term as a logarithm and then use rules of logarithms:










 

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