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sudut UPR + sudut RQV + sudut PRQ =180
10x + 5 + 1Ox - 15 + 70 = 180
20x +60 = 180
20x = 180 - 60
20x = 120
x = 120/20
= 6
sudut UPR = 10x + 5
= 10 (6) + 5
= 65
sudut RQV = 10x - 15
= 10(6) - 15
= 45
sudut PQR = 65°