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Pensil = 2, Pulpen = 2 = Rp.7500,00
7500 - 5500 = Pensil = 1, Pulpen = 0 = Rp.2000,00 (Harga 1 Pensil)
5500 - 2000 = Rp.3500,00 (Harga 2 Pulpen)
= 3500 : 2 = Rp.1750,00 (Harga 1 Pulpen)
Jadi Harga Pensil = Rp.2000,00 dan Harga Pulpen = Rp.1750,00
1 pnsil + 2 pulpen = 5500
____________________________ _
1 pensil = 2000
1 pensil = 2000
subtitusi :
1 pnsil + 2 pulpen = 5500
= 2000 + 2 pulpen = 5500
= 2 pulpen = 5500 - 2000
= 2 pulpen = 3500
= 1 pulpen = 3500 : 2
= 1 pulpen = 1750
Jadi harga 1 pensil = 2000 dan harga 1 pulpen 1750