$$ \begin{aligned} 18-4y &= 2(y+1)&& \text{simplify left and right hand side} \\[1 em]-4y+18 &= 2y+2&& \text{move the $ \color{blue}{ 2y } $ to the left side and $ \color{blue}{ 18 }$ to the right} \\[1 em]-4y-2y &= 2-18&& \text{simplify left and right hand side} \\[1 em]-6y &= -16&& \text{ divide both sides by $ -6 $ } \\[1 em]y &= \frac{-16}{-6}&& \\[1 em]y &= \frac{8}{3}&& \\[1 em] \end{aligned} $$

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