Answer:
The answer to your question is 120°
Step-by-step explanation:
1.- The internal angles in a triangle equals 180°
33° + 87° + x = 180 Substitution
x = 180 - 33 - 87 Simplification
x = 60°
2.- The sum of supplementary angles equals 180°
x + y = 180
60 + y = 180 Substitution
y = 180 - 60 Simplification
y = 120°