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3B+2P=29000
2B+2P=22000
> B=7000
Lanjut Pakai cara Substitusi
2B+2P=22000
2.7000+2P=22000
14000+2P=22000
2P=22000-14000
2P=8000
P=4000
Jadi Harga 1 Pulpen adalah Rp.4000,-