plis bantu jawab pake cara:)

1. 180 = x + 2x + 3x = 5x
x = 180/5 = 36

< A = 36 ; < B = 3(36) = 108 ; < C = 2(36) = 72

2.

a. gw ga nemu


b. 180 = 70 + 55 + x
x = 180 - 125 = 55

c. 180 = 50 + 50 + x
x = 180 - 100 = 80

3.

a. 180 = 60 + 75 + a
a = 180 - 135 = 45

b. 180 = 3a + a + 80
4a = 100
a = 25

c. 180 = X + 3a + 2a
180 = x + 5a
180 - x = 5a
a = 36 - x/5 (Gambar ga jelas salah gpp ya..)