$$ \begin{aligned} \frac{1}{3}-2\frac{y}{9} &= 29&& \text{multiply ALL terms by } \color{blue}{ 9 }. \\[1 em]9\cdot\frac{1}{3}-9\cdot2\frac{y}{9} &= 9\cdot29&& \text{cancel out the denominators} \\[1 em]3-2y &= 261&& \text{ move 3 to the right } \\[1 em]-2y &= 261-3&& \\[1 em]-2y &= 258&& \text{ divide both sides by $ -2 $ } \\[1 em]y &= -\frac{258}{2}&& \\[1 em]y &= -129&& \\[1 em] \end{aligned} $$

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