$$ \begin{aligned} \frac{k+k}{k} &= 6&& \text{multiply ALL terms by } \color{blue}{ k }. \\[1 em]k\frac{k+k}{k} &= k\cdot6&& \text{cancel out the denominators} \\[1 em]2k &= 6k&& \text{move the $ \color{blue}{ 6k } $ to the left side} \\[1 em]2k-6k &= 0&& \text{simplify left side} \\[1 em]-4k &= 0&& \text{ divide both sides by $ -4 $ } \\[1 em]k &= \frac{0}{-4}&& \\[1 em]k &= 0&& \\[1 em] \end{aligned} $$

This page was created using