$$ \begin{aligned} x+10 &= 3(x-1)\cdot2&& \text{simplify right side} \\[1 em]x+10 &= (3x-3)\cdot2&& \\[1 em]x+10 &= 6x-6&& \text{move the $ \color{blue}{ 6x } $ to the left side and $ \color{blue}{ 10 }$ to the right} \\[1 em]x-6x &= -6-10&& \text{simplify left and right hand side} \\[1 em]-5x &= -16&& \text{ divide both sides by $ -5 $ } \\[1 em]x &= \frac{-16}{-5}&& \\[1 em]x &= \frac{16}{5}&& \\[1 em] \end{aligned} $$

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