Answer:
132°
Step-by-step explanation:
y°=7x+20° (vertically opposite angles)
3x°+7x°+20°=180° (interior angles, since M is parallel to N)
10x+20°=180°
10x=180°-20°
10x=160°
x=16°
y°=7(16°)+20°
y°=112°+20°
y°=132°
