Answer:
first you need to dind the top angle
23°+36°=59°
as we know the sum of angles in a ️ is 180°
so we can find the angke next to y
180°-(59+54)=67°
the sum of this angle and y is 180° so we can find y
y=180°-67°=113°
or if you want a short way you can say that y= to the sum of the 2 other angles of the triangle which are on the other side of the angle next to y.
