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Jawaban:
1. F1 = 20N
F2 = 50N
(searah)
R = F1 + F2
R = 20N + 50N
R = 70N
2. F1 = 30N
F2 = 60N
(Berlawan arah)
R = F2 - F1
R = 60 - 30
R = 30N
moga membantu..