Tolong di bantu pliiiiiis​ no: 18-20

18. 3y + 102 = 180

3y = 180 – 102

3y = 78

y = 78/3

y = 26°

Jawaban: C.

19. 2p + 3p = 90

5p = 90

p = 90/5

p = 18°

Jawaban: C.

20. 4q – 20 + 60 = 180

4q + 40 = 180

4q = 180 – 40

4q = 140

q = 140/4

q = 35°

Jawaban: A.