tolong no 36,37,38 besok di kumpulkan thanks

36.
4x = 120
X= 30

5y = 180 - 120
Y= 12

X - Y = 18

37.

36. x = 30 y = 12
x + y = 42 drjt

37. 180 derajat

38. y - x = 21 drjt