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cari dulu selisih perbandingan , N : Y = 1 : 3 , jadi 3 -1 = 2
cari umur Nina dan Yuli
N=1/2 x 8 = 4
Y=3/2 x 8 = 12
12 + 4 = 16
1:3
1:4
=1:3:12
jml umur = 16/2 x 8 = 64 thun
smoga bisa membantu dan mff jika slh