Jawaban:
Umur Beno = 7/(7-4) x 9 = 7/3 x 9 = 21
Umur Aro = 4/(7-4) x 9 = 4/3 x 9 = 12
Selisih umur Beno dan Aro adalah 21 - 12 = 9 tahun
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Jawaban:
Umur Beno = 7/(7-4) x 9 = 7/3 x 9 = 21
Umur Aro = 4/(7-4) x 9 = 4/3 x 9 = 12
Selisih umur Beno dan Aro adalah 21 - 12 = 9 tahun