all angles in quadrelateral adds to 360
also, AGF=GFE and
GAE=AEF
so
GAE=AEF
4x-25=3x+10
x-25=10
x=35
GAE=4(35)-25=115
AGF+GFE+GAE+AEF=360
AGF+AGF+GAE+GAE=360
2AGF+2GAE=360
divide both sides by 2
AGF+GAE=180
AGF+115=180
minus 115 both sides
AGF=65
abswer is C