ln(3x+7)=ln(x-1)

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Solution for ln(3x+7)=ln(x-1) equation:


Simplifying
ln(3x + 7) = ln(x + -1)

Reorder the terms:
ln(7 + 3x) = ln(x + -1)
(7 * ln + 3x * ln) = ln(x + -1)
(7ln + 3lnx) = ln(x + -1)

Reorder the terms:
7ln + 3lnx = ln(-1 + x)
7ln + 3lnx = (-1 * ln + x * ln)
7ln + 3lnx = (-1ln + lnx)

Solving
7ln + 3lnx = -1ln + lnx

Solving for variable 'l'.

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

Add 'ln' to each side of the equation.
7ln + ln + 3lnx = -1ln + ln + lnx

Combine like terms: 7ln + ln = 8ln
8ln + 3lnx = -1ln + ln + lnx

Combine like terms: -1ln + ln = 0
8ln + 3lnx = 0 + lnx
8ln + 3lnx = lnx

Add '-1lnx' to each side of the equation.
8ln + 3lnx + -1lnx = lnx + -1lnx

Combine like terms: 3lnx + -1lnx = 2lnx
8ln + 2lnx = lnx + -1lnx

Combine like terms: lnx + -1lnx = 0
8ln + 2lnx = 0

Factor out the Greatest Common Factor (GCF), '2ln'.
2ln(4 + x) = 0

Ignore the factor 2.

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 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 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 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Add '-1x' to each side of the equation. x + -1x = -4 + -1x Combine like terms: x + -1x = 0 0 = -4 + -1x Simplifying 0 = -4 + -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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