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Pensil = P
1B = 2P
5(2P) + 3P = 26.000
= 10P + 3P = 26.000
= 13P = 26.000
P = 26.000/13
= 2.000
harga 1 buku = 2P
= 2 × 2.000
= 4.000
harga 3 buku + 1 pensil = (3 × 4.000) + (1×2000)
= 12.000+2.000
= 14.000