Question 26
The diagram shows the net of a cube. On each face there is an integer: $1$, $2011$, $1207$, $x$, $y$ and $z$.

If each of the numbers $1207$, $x$, $y$ and $z$ equals the average of the numbers written on the four faces of the cube adjacent to it, find the value of $x$.

If each of the numbers $1207$, $x$, $y$ and $z$ equals the average of the numbers written on the four faces of the cube adjacent to it, find the value of $x$.