ln(4-x)=-20

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Solution for ln(4-x)=-20 equation: 


Simplifying
ln(4 + -1x) = -20
(4 * ln + -1x * ln) = -20
(4ln + -1lnx) = -20

Solving
4ln + -1lnx = -20

Solving for variable 'l'.

Move all terms containing l to the left, all other terms to the right.

Reorder the terms:
20 + 4ln + -1lnx = -20 + 20

Combine like terms: -20 + 20 = 0
20 + 4ln + -1lnx = 0

The solution to this equation could not be determined.

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