SOLUTION: log4 x-log4 (x+3)= -1

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Question 184185: log4 x-log4 (x+3)= -1
Found 2 solutions by solver91311, Alan3354:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!




The difference of the logs is the log of the quotient:



Now use:



So:



Cross-multiply:



John

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
log4 x-log4 (x+3)= -1
log%284%2Cx%29+-+log%284%2C%28x%2B3%29%29+=+-1
log%284%2C%28x%2F%28x%2B3%29%29%29+=+-1
x/(x+3) = 1/4
4x = x+3
x = 1