ln(18)=ln(x-7)+ln(4)

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Solution for ln(18)=ln(x-7)+ln(4) equation:


Simplifying
ln(18) = ln(x + -7) + ln(4)

Reorder the terms for easier multiplication:
18ln = ln(x + -7) + ln(4)

Reorder the terms:
18ln = ln(-7 + x) + ln(4)
18ln = (-7 * ln + x * ln) + ln(4)
18ln = (-7ln + lnx) + ln(4)

Reorder the terms for easier multiplication:
18ln = -7ln + lnx + 4ln

Reorder the terms:
18ln = -7ln + 4ln + lnx

Combine like terms: -7ln + 4ln = -3ln
18ln = -3ln + lnx

Solving
18ln = -3ln + lnx

Solving for variable 'l'.

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

Add '3ln' to each side of the equation.
18ln + 3ln = -3ln + 3ln + lnx

Combine like terms: 18ln + 3ln = 21ln
21ln = -3ln + 3ln + lnx

Combine like terms: -3ln + 3ln = 0
21ln = 0 + lnx
21ln = lnx

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

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

Factor out the Greatest Common Factor (GCF), 'ln'.
ln(21 + -1x) = 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 '(21 + -1x)' equal to zero and attempt to solve: Simplifying 21 + -1x = 0 Solving 21 + -1x = 0 Move all terms containing l to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + -1x = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -1x = 0 + -21 -1x = 0 + -21 Combine like terms: 0 + -21 = -21 -1x = -21 Add 'x' to each side of the equation. -1x + x = -21 + x Combine like terms: -1x + x = 0 0 = -21 + x Simplifying 0 = -21 + 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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