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MathNet 2022-part-05 — 197 problems (EN–VI) Question 195

Math Olympiad Vault · MathNet 2022-part-05 — 197 problems (EN–VI)

Question 195

There is a positive real number $x$ not equal to either $\frac{1}{20}$ or $\frac{1}{2}$ such that
$$
\log_{20x}(22x) = \log_{2x}(202x).
$$
The value $\log_{20x}(22x)$ can be written as $\log_{10}(\frac{m}{n})$, where $m$ and $n$ are relatively prime positive integers. Find $m+n$.