To solve the equation \( 10^{\log x} = 10^{18} \), we can simplify by removing the base of the exponential (which is 10) from both sides of the equation.
This gives us:
\[ \log x = 18 \]
Now, to find the value of \( x \), we can use the property of logarithms which states that if \( \log x = a \), then \( x = 10^a \). Applying this here:
\[ x = 10^{18} \]
Therefore, the value of \( x \) is:
\[ \boxed{10^{18}} \]
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