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Bobby
Mathematics
4 November, 22:01
In (x-7) = ln8-ln (x) Solve for "x"
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Alden Lang
4 November, 22:18
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x = 8.
Step-by-step explanation:
ln (x - 7) = ln8 - lnx Using the laws of logarithms:
ln (x - 7) = ln (8/x)
x - 7 = 8/x
x^2 - 7x = 8
x^2 - 7x - 8 = 0
(x - 8) (x + 1) = 0
x = - 1, 8.
x must be 8 as there is no real value of the log of a negative.
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