If angle Y=2x this is equal to angle W because they are basically what is called inverted angles. Angles that lie opposite to one another about the intersection of two straight lines. (This is all the result of the fact that XW is parallel to YZ) In this case they are "displaced" to make it seem trickier than that. Since Y=W we can further say that W+X+90=180 because those three angles form the triangle we see. So we can say:
2x+3x-5+90=180
5x+85=180
5x=95
x=19°
