$$ \begin{aligned} 6+\frac{4}{2}x\cdot5 &= 0&& \text{multiply ALL terms by } \color{blue}{ 2 }. \\[1 em]2\cdot6+2 \cdot \frac{4}{2}x\cdot5 &= 2\cdot0&& \text{cancel out the denominators} \\[1 em]12+20x &= 0&& \text{ move the constants to the right } \\[1 em]20x &= -12&& \text{ divide both sides by $ 20 $ } \\[1 em]x &= -\frac{12}{20}&& \\[1 em]x &= -\frac{3}{5}&& \\[1 em] \end{aligned} $$

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