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x - 6 = 5 + (y - 6)
x - 6 = y - 1
x = y - 1 + 6
x = y + 5
(x + 2)/(y + 2) = 4/3
3(x + 2) = 4(y + 2)
3x + 6 = 4y + 8
3(y + 5) + 6 = 4y + 8
3y + 15 + 6 = 4y + 8
3y + 21 = 4y + 8
21 - 8 = 4y - 3y
y = 13
x = y + 5
x = 13 + 5
x = 18
Umur Amin sekarang adalah 18 tahun