SOLUTION: Solve the logarithmic equation. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.) ln x + ln (x-4) = ln 117

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: Solve the logarithmic equation. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.) ln x + ln (x-4) = ln 117      Log On


   

Question 891530: Solve the logarithmic equation. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.)
ln x + ln (x-4) = ln 117
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39621) About Me  (Show Source):
Answer by MathTherapy(10555) About Me  (Show Source):
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Solve the logarithmic equation. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.)
ln x + ln (x-4) = ln 117


ln x + ln (x - 4) = ln 117

x(x - 4) = 117

x%5E2+-+4x+-+117+=+0

(x - 13)(x + 9) = 0

highlight_green%28x+=+13%29                 or                  x = - 9 (ignore, as this is an EXTRANEOUS solution)