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The equation ln (x-1) - ln x = ln 49 has to be solved.
Use the property ln x - ln y = ln(x/y)
ln (x-1) - ln x = ln 49
=> ln((x - 1)/x) = ln 49
(x - 1)/x = 49
=> x - 1 = 49x
=> 48x = -1
=> x = -1/48
But the logarithm of a negative number does not exist.
The equation has no solution.
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