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Umur kakak dimisalkan k
A =k-8
a/k = 3/5
k-a =8
k+a?
5-3/5+3 =8/k+a
2/8 = 8/k+a
k+a= 32
Jumlah umur mereka 2 tahun mendatang??
k+a = 32
K-a= 8
2a = 24
a=12
k = 20
2 thn mendatang 12+2+20+2 = 36