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x1 = 72
n2 = 1
x2 =x2
Xg = 72+1= 73
.
(n1+n2) Xg = n1 x1 + n2 x2
(12+1) 73 = 12(72) + 1 (x2)
x2 = 13(73) - 12(72) = 85
nilai Berlian = 85