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Simplifying log(x + 9) = log(x) + log(9) Reorder the terms: glo(9 + x) = log(x) + log(9) (9 * glo + x * glo) = log(x) + log(9) (9glo + glox) = log(x) + log(9) Multiply glo * x 9glo + glox = glox + log(9) Reorder the terms for easier multiplication: 9glo + glox = glox + 9glo Reorder the terms: 9glo + glox = 9glo + glox Add '-9glo' to each side of the equation. 9glo + -9glo + glox = 9glo + -9glo + glox Combine like terms: 9glo + -9glo = 0 0 + glox = 9glo + -9glo + glox glox = 9glo + -9glo + glox Combine like terms: 9glo + -9glo = 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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