$$ \begin{aligned} 3(6x-5) &= 6x&& \text{simplify left side} \\[1 em]18x-15 &= 6x&& \text{move the $ \color{blue}{ 6x } $ to the left side and $ \color{blue}{ -15 }$ to the right} \\[1 em]18x-6x &= 15&& \text{simplify left side} \\[1 em]12x &= 15&& \text{ divide both sides by $ 12 $ } \\[1 em]x &= \frac{15}{12}&& \\[1 em]x &= \frac{5}{4}&& \\[1 em] \end{aligned} $$

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