$$ \begin{aligned} 211-y+36 &= 19+12y+7&& \text{simplify left and right hand side} \\[1 em]-y+247 &= 12y+26&& \text{move the $ \color{blue}{ 12y } $ to the left side and $ \color{blue}{ 247 }$ to the right} \\[1 em]-y-12y &= 26-247&& \text{simplify left and right hand side} \\[1 em]-13y &= -221&& \text{ divide both sides by $ -13 $ } \\[1 em]y &= \frac{-221}{-13}&& \\[1 em]y &= 17&& \\[1 em] \end{aligned} $$

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