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1 pak = 5a
3 pak = 52500
3 . 5a = 52500
15a = 52500
a = 52500/15
a = 3500
jadi, harga setiap buku = Rp.3500
:setiap buku 5 buah
:dina membayar 52,500,00
Dit:berapa harga buku satu buah y
jawab:15*5/52,500.00
:700,00
jadi Dina harus membayar 700,00 setiap buku nya