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Verified answer
Ayah:ibu:kiko=8:7:3jumlah=8+7+3=18---->72
a.ayah=8/18×72=32 thn
ibu=7/18×72=28 thn
kiko =3/18×72=12 tn
b.selisih ayah ibu=8-7=1-->1/18×72 =4 tahun