If 5−log101+x+4log101−x=log1011−x25 - \log_{10}\sqrt{1 + x} + 4 \log_{10} \sqrt{1 - x} = \log_{10} \frac{1}{\sqrt{1 - x^2}}5−log101+x+4log101−x=log101−x21, then 100x equals
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