harga buku 1 lusin Rp 60.000 jika Wawan membeli 10 buku berapapun uang yang dibayarkan
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Jawaban:
[tex]1 \: lusin = 12 \\ harga \: 1 \: buah \: buku = \frac{60.000}{12} = 5000 \\ mk \: harga \: 10 \: buku = 10 \times 5000 = rp. \: 50.000[/tex]
wawan beli 10
10 X 60 = 600.000
10 lusin = Rp600.000