Jawabanmu

2014-02-24T22:40:13+07:00
Harga 1/2 lusin pensil => Rp 6.600 => 6 pensil 
Harga 1 pensil => Rp 6.600 : 6 = Rp 1.100
Harga 9 pensil => Rp 1.100 x 9 = Rp 9.900
2014-02-24T22:40:36+07:00
Harga 1 pensil berarti 1.100 jadi 1.100*9=9.900,00
semoga membantu yaa
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