ln(x+4)+ln(x+3)=ln(x-13)

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Solution for ln(x+4)+ln(x+3)=ln(x-13) equation:


Simplifying
ln(x + 4) + ln(x + 3) = ln(x + -13)

Reorder the terms:
ln(4 + x) + ln(x + 3) = ln(x + -13)
(4 * ln + x * ln) + ln(x + 3) = ln(x + -13)
(4ln + lnx) + ln(x + 3) = ln(x + -13)

Reorder the terms:
4ln + lnx + ln(3 + x) = ln(x + -13)
4ln + lnx + (3 * ln + x * ln) = ln(x + -13)
4ln + lnx + (3ln + lnx) = ln(x + -13)

Reorder the terms:
4ln + 3ln + lnx + lnx = ln(x + -13)

Combine like terms: 4ln + 3ln = 7ln
7ln + lnx + lnx = ln(x + -13)

Combine like terms: lnx + lnx = 2lnx
7ln + 2lnx = ln(x + -13)

Reorder the terms:
7ln + 2lnx = ln(-13 + x)
7ln + 2lnx = (-13 * ln + x * ln)
7ln + 2lnx = (-13ln + lnx)

Solving
7ln + 2lnx = -13ln + lnx

Solving for variable 'l'.

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

Add '13ln' to each side of the equation.
7ln + 13ln + 2lnx = -13ln + 13ln + lnx

Combine like terms: 7ln + 13ln = 20ln
20ln + 2lnx = -13ln + 13ln + lnx

Combine like terms: -13ln + 13ln = 0
20ln + 2lnx = 0 + lnx
20ln + 2lnx = lnx

Add '-1lnx' to each side of the equation.
20ln + 2lnx + -1lnx = lnx + -1lnx

Combine like terms: 2lnx + -1lnx = 1lnx
20ln + 1lnx = lnx + -1lnx

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

Factor out the Greatest Common Factor (GCF), 'ln'.
ln(20 + x) = 0

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 '(20 + x)' equal to zero and attempt to solve: Simplifying 20 + x = 0 Solving 20 + x = 0 Move all terms containing l to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + x = 0 + -20 x = 0 + -20 Combine like terms: 0 + -20 = -20 x = -20 Add '-1x' to each side of the equation. x + -1x = -20 + -1x Combine like terms: x + -1x = 0 0 = -20 + -1x Simplifying 0 = -20 + -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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