$$\left. \begin{array} { l } { x = 3 , 1 , 4 , 10 = 92 , 87 , 85 , 80 } \\ { x = ? } \end{array} \right.$$
$x=3,\ \text{false},\ y=1,\ z=4,\ a=87,\ b=85,\ c=80,\ d=x$
