SOLUTION: Please help me. thanks 1.Solve for x: log4x+log4(x+4)=9 2. For what value of x is the following true? log(x+10)=logx+log10. 3. Solve for x: (log3(log3 x))=&#87

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: Please help me. thanks 1.Solve for x: log4x+log4(x+4)=9 2. For what value of x is the following true? log(x+10)=logx+log10. 3. Solve for x: (log3(log3 x))=&#87      Log On


   

Question 1024187: Please help me. thanks
1.Solve for x:
log4x+log4(x+4)=9


2. For what value of x is the following true?
log(x+10)=logx+log10.


3. Solve for x: (log3(log3 x))=−1








Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
1. Re-edit this problem.

2. log(x+10) =logx + log10
==> log%28%28x%2B10%29%2Fx%29+=+log10
==> %28x%2B10%29%2Fx+=+10
==> x+10 = 10x ==> 9x = 10, or x = 10/9.

3. log%283%2C+log%283%2Cx%29%29+=+-1
==> log%283%2Cx%29+=+3%5E%28-1%29+=+1%2F3
==> x+=+3%5E%281%2F3%29+=+root%283%2C3%29