$$ \begin{aligned} 2y+5 &= 3y&& \text{move the $ \color{blue}{ 3y } $ to the left side and $ \color{blue}{ 5 }$ to the right} \\[1 em]2y-3y &= -5&& \text{simplify left side} \\[1 em]-y &= -5&& \text{switch signs on both sides} \\[1 em]y &= 5&& \\[1 em] \end{aligned} $$