SOLUTION: {{{log(subscript2)(x)+log(subscript2)(x-15)=4}}}

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Question 813506: log%28subscript2%29%28x%29%2Blog%28subscript2%29%28x-15%29=4
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
log%282%2C%28x%29%29%2Blog%282%2C%28x-15%29%29=4
adding logs is multiply
log%282%2C%28x%28x-15%29%29%29+=+4
The exponent equiv of logs
x(x-15) = 2^4
x(x-15) = 16
x^2 - 15x - 16 = 0
Factors to
(x-16)(x+1) = 0
The positive solution is all we can use here
x = 16