You can put this solution on YOUR website! ---
ln(5) + ln(x - 4) = ln(x)
ln( 5(x - 4) ) = ln(x)
e^( 5(x - 4) ) = e^( ln(x) )
5(x - 4) = x
5x - 20 = x
4x = 20
x = 5
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