Step-by-step explanation:
Let's take the blank space between y° and 40° as n°. Then let's solve angle AFC, and remember x is given, 110°.
x°+ n°+ 50° = 180°
110°+50°+n°=180°
160°+n° =180°
n = 180° - 160°
n = 20°
Remember that angle y, angle 40° and angle n are on a straight line, which means they add up to 180°. So
y + n°+ 40°=180°
y +20° +40° = 180°
y+ 60° =180°
y = 180° - 60°
y = 120°
Hope u find this helpful
