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Simplifying ln(7 + x) = ln(4x + -5) (7 * ln + x * ln) = ln(4x + -5) (7ln + lnx) = ln(4x + -5) Reorder the terms: 7ln + lnx = ln(-5 + 4x) 7ln + lnx = (-5 * ln + 4x * ln) 7ln + lnx = (-5ln + 4lnx) Solving 7ln + lnx = -5ln + 4lnx Solving for variable 'l'. Move all terms containing l to the left, all other terms to the right. Add '5ln' to each side of the equation. 7ln + 5ln + lnx = -5ln + 5ln + 4lnx Combine like terms: 7ln + 5ln = 12ln 12ln + lnx = -5ln + 5ln + 4lnx Combine like terms: -5ln + 5ln = 0 12ln + lnx = 0 + 4lnx 12ln + lnx = 4lnx Add '-4lnx' to each side of the equation. 12ln + lnx + -4lnx = 4lnx + -4lnx Combine like terms: lnx + -4lnx = -3lnx 12ln + -3lnx = 4lnx + -4lnx Combine like terms: 4lnx + -4lnx = 0 12ln + -3lnx = 0 Factor out the Greatest Common Factor (GCF), '3ln'. 3ln(4 + -1x) = 0 Ignore the factor 3.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 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 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 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Add 'x' to each side of the equation. -1x + x = -4 + x Combine like terms: -1x + x = 0 0 = -4 + x Simplifying 0 = -4 + 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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