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Verified answer
Rio : Ibunya = 1:7 = 32= 8 = 32
= 32 : 8 = 4
Rio = 4 tahun
Ibunya = 7.4 = 28 tahun
28 + n = (bisa dibagi 5)
28 + n = 30
n = 30-28
n = 2
Rio = 4 + 2 tahun = 6 tahun
Ibunya = 28 + 2 tahun = 30 tahun
6 : 30 / 6
1 : 5