Solve for t
\left\{\begin{matrix}t=0\text{, }&u<0\\t=\frac{3}{4y}\text{, }&\left(u=0\text{ and }y>0\right)\text{ or }\left(y<\frac{3}{4u}\text{ and }u<\frac{3}{4y}\text{ and }u>0\text{ and }y>0\right)\end{matrix}\right.
Solve for y
\left\{\begin{matrix}y=\frac{\sqrt{\frac{t-u}{t}}}{u}\text{, }&u\neq 0\text{ and }t>0\text{ and }t>u\\y\in \mathrm{R}\text{, }&t=0\text{ and }u<0\end{matrix}\right.
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