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Simplifying log(x + 15) = log(x) + log(15) Reorder the terms: glo(15 + x) = log(x) + log(15) (15 * glo + x * glo) = log(x) + log(15) (15glo + glox) = log(x) + log(15) Multiply glo * x 15glo + glox = glox + log(15) Reorder the terms for easier multiplication: 15glo + glox = glox + 15glo Reorder the terms: 15glo + glox = 15glo + glox Add '-15glo' to each side of the equation. 15glo + -15glo + glox = 15glo + -15glo + glox Combine like terms: 15glo + -15glo = 0 0 + glox = 15glo + -15glo + glox glox = 15glo + -15glo + glox Combine like terms: 15glo + -15glo = 0 glox = 0 + glox glox = glox Add '-1glox' to each side of the equation. glox + -1glox = glox + -1glox Combine like terms: glox + -1glox = 0 0 = glox + -1glox Combine like terms: glox + -1glox = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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