The given figure is of a kite.
So, their one pair of opposite angles will be equal, that is non vertex angles
y,110o are non vertex angles while x,60o are vertex angles
⇒y=110∘
From sum properties of quadrilateral
110∘+60∘+y+x=360∘
⇒110∘+60∘+110∘+x=360∘
⇒x=360∘−280∘=80∘