ln(x+5)+ln(x+8)=ln(7)

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Solution for ln(x+5)+ln(x+8)=ln(7) equation:


Simplifying
ln(x + 5) + ln(x + 8) = ln(7)

Reorder the terms:
ln(5 + x) + ln(x + 8) = ln(7)
(5 * ln + x * ln) + ln(x + 8) = ln(7)
(5ln + lnx) + ln(x + 8) = ln(7)

Reorder the terms:
5ln + lnx + ln(8 + x) = ln(7)
5ln + lnx + (8 * ln + x * ln) = ln(7)
5ln + lnx + (8ln + lnx) = ln(7)

Reorder the terms:
5ln + 8ln + lnx + lnx = ln(7)

Combine like terms: 5ln + 8ln = 13ln
13ln + lnx + lnx = ln(7)

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

Reorder the terms for easier multiplication:
13ln + 2lnx = 7ln

Solving
13ln + 2lnx = 7ln

Solving for variable 'l'.

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

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

Combine like terms: 13ln + -7ln = 6ln
6ln + 2lnx = 7ln + -7ln

Combine like terms: 7ln + -7ln = 0
6ln + 2lnx = 0

Factor out the Greatest Common Factor (GCF), '2ln'.
2ln(3 + 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 '(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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