ln(6x)=ln(21-x)

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Solution for ln(6x)=ln(21-x) equation:


Simplifying
ln(6x) = ln(21 + -1x)

Remove parenthesis around (6x)
ln * 6x = ln(21 + -1x)

Reorder the terms for easier multiplication:
6ln * x = ln(21 + -1x)

Multiply ln * x
6lnx = ln(21 + -1x)
6lnx = (21 * ln + -1x * ln)
6lnx = (21ln + -1lnx)

Solving
6lnx = 21ln + -1lnx

Solving for variable 'l'.

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

Add '-21ln' to each side of the equation.
-21ln + 6lnx = 21ln + -21ln + -1lnx

Combine like terms: 21ln + -21ln = 0
-21ln + 6lnx = 0 + -1lnx
-21ln + 6lnx = -1lnx

Add 'lnx' to each side of the equation.
-21ln + 6lnx + lnx = -1lnx + lnx

Combine like terms: 6lnx + lnx = 7lnx
-21ln + 7lnx = -1lnx + lnx

Combine like terms: -1lnx + lnx = 0
-21ln + 7lnx = 0

Factor out the Greatest Common Factor (GCF), '7ln'.
7ln(-3 + x) = 0

Ignore the factor 7.

Subproblem 1

Set the factor 'ln' equal to zero and attempt to solve: Simplifying ln = 0 Solving ln = 0 Move all terms containing l to the left, all other terms to the right. Simplifying ln = 0 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(-3 + x)' equal to zero and attempt to solve: Simplifying -3 + x = 0 Solving -3 + x = 0 Move all terms containing l to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + x = 0 + 3 x = 0 + 3 Combine like terms: 0 + 3 = 3 x = 3 Add '-1x' to each side of the equation. x + -1x = 3 + -1x Combine like terms: x + -1x = 0 0 = 3 + -1x Simplifying 0 = 3 + -1x The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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