$$ \begin{aligned} 4+\frac{2}{3}y &= -5&& \text{multiply ALL terms by } \color{blue}{ 3 }. \\[1 em]3\cdot4+3 \cdot \frac{2}{3}y &= 3\cdot(-5)&& \text{cancel out the denominators} \\[1 em]12+2y &= -15&& \text{ move 12 to the right } \\[1 em]2y &= -15-12&& \\[1 em]2y &= -27&& \text{ divide both sides by $ 2 $ } \\[1 em]y &= -\frac{27}{2}&& \\[1 em] \end{aligned} $$

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