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Simplifying ln(x) + ln(x + -4) = ln(7x) Multiply ln * x lnx + ln(x + -4) = ln(7x) Reorder the terms: lnx + ln(-4 + x) = ln(7x) lnx + (-4 * ln + x * ln) = ln(7x) lnx + (-4ln + lnx) = ln(7x) Reorder the terms: -4ln + lnx + lnx = ln(7x) Combine like terms: lnx + lnx = 2lnx -4ln + 2lnx = ln(7x) Remove parenthesis around (7x) -4ln + 2lnx = ln * 7x Reorder the terms for easier multiplication: -4ln + 2lnx = 7ln * x Multiply ln * x -4ln + 2lnx = 7lnx Solving -4ln + 2lnx = 7lnx Solving for variable 'l'. Move all terms containing l to the left, all other terms to the right. Add '-7lnx' to each side of the equation. -4ln + 2lnx + -7lnx = 7lnx + -7lnx Combine like terms: 2lnx + -7lnx = -5lnx -4ln + -5lnx = 7lnx + -7lnx Combine like terms: 7lnx + -7lnx = 0 -4ln + -5lnx = 0 Factor out the Greatest Common Factor (GCF), '-1ln'. -1ln(4 + 5x) = 0 Ignore the factor -1.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 + 5x)' equal to zero and attempt to solve: Simplifying 4 + 5x = 0 Solving 4 + 5x = 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 + 5x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 5x = 0 + -4 5x = 0 + -4 Combine like terms: 0 + -4 = -4 5x = -4 Add '-5x' to each side of the equation. 5x + -5x = -4 + -5x Combine like terms: 5x + -5x = 0 0 = -4 + -5x Simplifying 0 = -4 + -5x 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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