SOLUTION: Good evening Friends, I have some difficulties solving the following logarithmic equation: (log2(x) - log0.5(x) -2)/(3log2(x) +2)=4 Has somebody a step by step solution to help

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Good evening Friends, I have some difficulties solving the following logarithmic equation: (log2(x) - log0.5(x) -2)/(3log2(x) +2)=4 Has somebody a step by step solution to help       Log On


   



Question 1012270: Good evening Friends, I have some difficulties solving the following
logarithmic equation: (log2(x) - log0.5(x) -2)/(3log2(x) +2)=4
Has somebody a step by step solution to help me?
Thank you very much in advance

Answer by ikleyn(52803) About Me  (Show Source):
You can put this solution on YOUR website!
.
(log2(x) - log0.5(x) -2)/(3log2(x) +2)=4
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Your equation is 

%28log%282%2C%28x%29%29+-+log%280.5%2C%28x%29%29+-2%29%2F%283%2Alog%282%2C%28x%29%29%2B2%29 = 4.

First, notice that log(0.5,(x)) = -log(2,(x)). It is easy to understand if you know what the logarithm is.

Second, introduce a new variable y = log(2,(x)) for brevity.

Then your equation will take the form

%28y+%2B+y+-2%29%2F%283y%2B2%29 = 4,   or  %28y-1%29%2F%283y%2B2%29 = 2.

I am sure you can easily solve it.

The solution is y = -1.

Then you need to solve the equation 

log%282%2C%28x%29%29 = -1,

which will give you the answer x = 1%2F2.

Answer. x = 1%2F2.

Introducing new variable is the standard way to solve equations like this one.