$$ \begin{aligned} 46 &= -6y-8&& \text{ swap the left and right side of the equation } \\[1 em]-6y-8 &= 46&& \text{ move -8 to the right } \\[1 em]-6y &= 46+8&& \\[1 em]-6y &= 54&& \text{ divide both sides by $ -6 $ } \\[1 em]y &= -\frac{54}{6}&& \\[1 em]y &= -9&& \\[1 em] \end{aligned} $$