Look at this parallelogram and its co-ordinates.
Look at the top right-hand corner and try to work out its y-coordinate.
It must be 7 because it is level with the top left-hand corner.
Now look at the x co-ordinates of the two left-hand points. The upper point is two units to the right of the lower point.
This must also be the case on the right-hand side of the parallelogram, so the top point has an x co-ordinate of 8 + 2 = 10
The top right-hand corner has co-ordinates (10, 7) and it is has been possible to work this out without reading the axes.