$$ \begin{aligned} 3(4x-2)+6 &= 2x+20&& \text{simplify left side} \\[1 em]12x-6+6 &= 2x+20&& \\[1 em]12x-6+6 &= 2x+20&& \\[1 em]12x &= 2x+20&& \text{move the $ \color{blue}{ 2x } $ to the left side} \\[1 em]12x-2x &= 20&& \text{simplify left side} \\[1 em]10x &= 20&& \text{ divide both sides by $ 10 $ } \\[1 em]x &= \frac{20}{10}&& \\[1 em]x &= 2&& \\[1 em] \end{aligned} $$

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