\left\{ \begin{array} { l } { y = \frac { 5 } { z + 0.8 } } \\ { S = \frac { 2 ( z - 1 ) } { T ( z + 1 ) } } \end{array} \right.
Solve for y, z, S, T (complex solution)
y=\frac{5}{z+0.8}
z\in \mathrm{C}
S=\frac{2\left(z-1\right)}{T\left(z+1\right)}
T\in \mathrm{C}
Solve for y, z, S, T
y=\frac{5}{z+0.8}
z\in \mathrm{R}
S=\frac{2\left(z-1\right)}{T\left(z+1\right)}
T\in \mathrm{R}
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