ln(x+7)=ln(4x-5)

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Solution for ln(x+7)=ln(4x-5) equation:


Simplifying
ln(x + 7) = ln(4x + -5)

Reorder the terms:
ln(7 + x) = ln(4x + -5)
(7 * ln + x * ln) = ln(4x + -5)
(7ln + lnx) = ln(4x + -5)

Reorder the terms:
7ln + lnx = ln(-5 + 4x)
7ln + lnx = (-5 * ln + 4x * ln)
7ln + lnx = (-5ln + 4lnx)

Solving
7ln + lnx = -5ln + 4lnx

Solving for variable 'l'.

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

Add '5ln' to each side of the equation.
7ln + 5ln + lnx = -5ln + 5ln + 4lnx

Combine like terms: 7ln + 5ln = 12ln
12ln + lnx = -5ln + 5ln + 4lnx

Combine like terms: -5ln + 5ln = 0
12ln + lnx = 0 + 4lnx
12ln + lnx = 4lnx

Add '-4lnx' to each side of the equation.
12ln + lnx + -4lnx = 4lnx + -4lnx

Combine like terms: lnx + -4lnx = -3lnx
12ln + -3lnx = 4lnx + -4lnx

Combine like terms: 4lnx + -4lnx = 0
12ln + -3lnx = 0

Factor out the Greatest Common Factor (GCF), '3ln'.
3ln(4 + -1x) = 0

Ignore the factor 3.

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 '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing l to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Add 'x' to each side of the equation. -1x + x = -4 + x Combine like terms: -1x + x = 0 0 = -4 + x Simplifying 0 = -4 + x 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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