$$ \begin{aligned} \frac{60}{4}6x\cdot3 &= 0&& \text{multiply ALL terms by } \color{blue}{ 4 }. \\[1 em]4 \cdot \frac{60}{4}6x\cdot3 &= 4\cdot0&& \text{cancel out the denominators} \\[1 em]1080x &= 0&& \text{ divide both sides by $ 1080 $ } \\[1 em]x &= \frac{0}{1080}&& \\[1 em]x &= 0&& \\[1 em] \end{aligned} $$
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