$$\left. \begin{array} { l } { | \frac { 5 } { 3 } + \frac { - 7 } { 6 } | } \\ { | x \times v | = | x | x | y | } \end{array} \right.$$
$\left\{\begin{matrix}\\x=0\text{, }y\in \mathrm{R}\text{, }z=\frac{1}{2}=0.5\text{; }x=\frac{|v|}{|y|}\text{, }y\neq 0\text{, }z=\frac{1}{2}=0.5\text{, }&\text{unconditionally}\\x\geq 0\text{, }y=0\text{, }z=\frac{1}{2}=0.5\text{; }x=0\text{, }y\neq 0\text{, }z=\frac{1}{2}=0.5\text{; }x\leq 0\text{, }y=0\text{, }z=\frac{1}{2}=0.5\text{, }&v=0\end{matrix}\right.$
