Hello everybody

I was doing revision on past problem solving papers and came across this problem:

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

(The diagram is shown like this, it is a net for a cube but can't show a proper diagram cause of the limited actions

1207

X,y,2011,z

1

(in that order, just imagine lined boxes around them)

(continuing with the problem)

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

Can anyone plz explain this to me fairly simply if you can get the answer.(BTW I currently don't have the answers for this question)