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X1 = Bilangan Pertama
X2 = Bilangan kedua
X1+X2 = 35
X2-X1 = 5
---------------------- +
2.X2 = 40
X2 = 20
X1+X2 = 35
X1 + 20 = 35
X1 = 15
X1.X2 = 15.20 = 300