$$ \begin{aligned} \frac{24}{x} &= 6&& \text{multiply ALL terms by } \color{blue}{ x }. \\[1 em]x\cdot\frac{24}{x} &= x\cdot6&& \text{cancel out the denominators} \\[1 em]24 &= 6x&& \text{ swap the left and right side of the equation } \\[1 em]6x &= 24&& \text{ divide both sides by $ 6 $ } \\[1 em]x &= \frac{24}{6}&& \\[1 em]x &= 4&& \\[1 em] \end{aligned} $$

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