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Simplifying ln(7x + 4) = ln(2x + -21) Reorder the terms: ln(4 + 7x) = ln(2x + -21) (4 * ln + 7x * ln) = ln(2x + -21) (4ln + 7lnx) = ln(2x + -21) Reorder the terms: 4ln + 7lnx = ln(-21 + 2x) 4ln + 7lnx = (-21 * ln + 2x * ln) 4ln + 7lnx = (-21ln + 2lnx) Solving 4ln + 7lnx = -21ln + 2lnx Solving for variable 'l'. Move all terms containing l to the left, all other terms to the right. Add '21ln' to each side of the equation. 4ln + 21ln + 7lnx = -21ln + 21ln + 2lnx Combine like terms: 4ln + 21ln = 25ln 25ln + 7lnx = -21ln + 21ln + 2lnx Combine like terms: -21ln + 21ln = 0 25ln + 7lnx = 0 + 2lnx 25ln + 7lnx = 2lnx Add '-2lnx' to each side of the equation. 25ln + 7lnx + -2lnx = 2lnx + -2lnx Combine like terms: 7lnx + -2lnx = 5lnx 25ln + 5lnx = 2lnx + -2lnx Combine like terms: 2lnx + -2lnx = 0 25ln + 5lnx = 0 Factor out the Greatest Common Factor (GCF), '5ln'. 5ln(5 + x) = 0 Ignore the factor 5.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 '(5 + x)' equal to zero and attempt to solve: Simplifying 5 + x = 0 Solving 5 + x = 0 Move all terms containing l to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + x = 0 + -5 x = 0 + -5 Combine like terms: 0 + -5 = -5 x = -5 Add '-1x' to each side of the equation. x + -1x = -5 + -1x Combine like terms: x + -1x = 0 0 = -5 + -1x Simplifying 0 = -5 + -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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