So, here we have a hexagon. In geometry, there is a rule which says that the sum of all the angles inside a hexagon is equal to 720 degrees.
So, all we have to do is figure out the sum of the 5 angles we already have, and subtract that from 720.
112+133+128+100+120=593 (if I calculated that correctly)
So our angle ‘x’ would be 720-593, or 127 degrees.