$$ \begin{aligned} 2y &= 7(y-2)+4&& \text{simplify right side} \\[1 em]2y &= 7y-14+4&& \\[1 em]2y &= 7y-10&& \text{move the $ \color{blue}{ 7y } $ to the left side} \\[1 em]2y-7y &= -10&& \text{simplify left side} \\[1 em]-5y &= -10&& \text{ divide both sides by $ -5 $ } \\[1 em]y &= \frac{-10}{-5}&& \\[1 em]y &= 2&& \\[1 em] \end{aligned} $$

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