Tolong bantu saya jawab no 1 & 2

1.
a.

a = 180 - 120
a = 60

b = 60

a + b = 60 + 60 = 120

c = 180 - (60 + 60)
c = 180 - 120
c = 60

b.
a : b : c
60 : 60 : 60
1 : 1 : 1

2.
a.
x = 25 + (65 -15)
x = 25 + 50
x = 75

b.
x = 180 - 35
x = 145