$$\left. \begin{array} { l } { x = 2 x y = 2 } \\ { x - 3 | - 2 - 1 | 0 | 213 } \\ { 4 - 2 - 101 | 234 } \\ { x - 3 - 110 | 0 + 34 } \\ { x - 3 - 1010 | + 3 } \\ { 4 + 4 | 3 x | 10 - 12 } \end{array} \right.$$
$\left\{\begin{matrix}\\x=0\text{, }&\text{unconditionally}\\x\in \mathrm{C}\text{, }&y=\frac{1}{2}\end{matrix}\right.$
$\left\{\begin{matrix}\\x=0\text{, }&\text{unconditionally}\\x\in \mathrm{R}\text{, }&y=\frac{1}{2}\end{matrix}\right.$
