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p = pensil
4b + 3p = 13.500 | x3 | 12b + 9p = 40.500
3b + 2p = 9.750 | x4 | 12b + 8p = 39.000 -
p = 1500
3b + 2p = 9.750
3b + 2(1.500) = 9.750
3b + 3.000 = 9.750
3b = 9.750 - 3.000
b = 6.750/3
= 2.250
2b + 3p =
2(2.250) + 3(1.500) =
4.500 + 4.500 = 9.000
Harga = Rp 9.000