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5K + 7G = 13.000
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smaakan g
14K + 28G = 49.000 [x7]
20K + 28G = 52.000 [x4]
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-6K = -3000
k = -3000 ÷ -6
k = 500
1 lusin = 500 x 12 = 6.000
2 Kelereng + 4 Gasing= Rp. 7.000
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Biar enak, kt samakan jumlah gasing.
20Kelereng+28Gasing=Rp.52.000
14Kelereng+28Gasing= Rp.49.000
___________________________ -
6Kelereng=Rp.3000
K=500
500x12=Rp.6000
jd harga 1 lusinnya Rp. 6000