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gita = y
gita + itsar = 11
y + y - 3 = 11
2y - 3 = 11
2y = 11 + 3
2y = 14
y = 7
umur skrg
itsar =y-3= 7-3 = 4
gita = y = 7
2 tahun kemudian
itsar = 4 + 2 = 6
gita = 7 + 2 = 9
itsar : gita
6 : 9
2 : 3
Misalkan umur Gita = g
i = g - 3
i + g = 11
(g - 3) + g = 11
g - 3 + g = 11
g + g = 11 + 3
2g = 14
g = 7
i = g - 3
i = 7 - 3
i = 4
Itsar = 4 + 2
= 6 tahun
Gita = 7 + 2
= 9 tahun
Rasio = Itsar : Gita
= 6 tahun : 9 tahun
= 2 : 3