I believe that the graph you refer the is this one: (attachment)
first, y: y and 116 together will form 180 degrees, so y will be 180-116=64 Degrees!
now, x: all four angles will sum up to 360 (as in every quadrilateral) so we have
x+64+125+72=360
x+261=360
so x will be 99 Degrees!