$$ \begin{aligned} (\frac{1}{2})^3 &= x&& \text{multiply ALL terms by } \color{blue}{ 2 }. \\[1 em]2(\frac{1}{2})^3 &= 2x&& \text{cancel out the denominators} \\[1 em]0 &= 2x&& \text{ swap the left and right side of the equation } \\[1 em]2x &= 0&& \text{ divide both sides by $ 2 $ } \\[1 em]x &= \frac{0}{2}&& \\[1 em]x &= 0&& \\[1 em] \end{aligned} $$

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