Jawabanmu

2014-03-25T20:29:12+07:00
Diket:tabungan akhir=3.815000
B=12%/Tahun:12=1%/bulan
9bulan=9%

Question:tabungan awal?

Answer:

tab.awal=3.815.000. \frac{100}{100+9}  \\  \\ =3815000. \frac{100}{109}  \\  \\ =3.500.000

Jadi,tab.awalnya Rp3500.000

2014-03-25T20:38:20+07:00
1 thn =12%
9 bln =9% karena 12% = 12 bln, 9%=9 bln
3.815.000x9%=343.350
3.815.000-343.350=3.471.650