$$5x-18^7 = 0$$
Answer
$$ x = \frac{612220032}{5} $$
Explanation
$$ \begin{aligned} 5x-18^7 &= 0&& \text{simplify left side} \\[1 em]5x-612220032 &= 0&& \text{ move the constants to the right } \\[1 em]5x &= 612220032&& \text{ divide both sides by $ 5 $ } \\[1 em]x &= \frac{612220032}{5}&& \\[1 em] \end{aligned} $$
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