$$y = 3\cdot\frac{7}{12}-2$$

$$ \begin{aligned} y &= 3\cdot\frac{7}{12}-2&& \text{multiply ALL terms by } \color{blue}{ 12 }. \\[1 em]12y &= 12\cdot3\cdot\frac{7}{12}-12\cdot2&& \text{cancel out the denominators} \\[1 em]12y &= 21-24&& \text{simplify right side} \\[1 em]12y &= -3&& \text{ divide both sides by $ 12 $ } \\[1 em]y &= -\frac{3}{12}&& \\[1 em]y &= -\frac{1}{4}&& \\[1 em] \end{aligned} $$

This page was created using