Answer:
80 degrees
Explanation:
Remember that corresponding angles are equal!
angle CBD and angle BFH are obviously corresponding angles.
(SEE ATTACHMENT IF YOU DON'T UNDERSTAND)
So, angle CBD = angle BFH = 100 degrees.
The angles of a line add to 180 degrees
angle BFH is 100 degrees and one part of this line. So the other part (aka angle x) is 180 - 100 = 80 degrees.
Thus, x is 80 degrees.