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Verified answer
Misal:Pensil = p
Buku = b
Diket:
3p + 2b = 4.000
2p + 2b = 7.250
Ditanya: 3p + 12b = ......
Jawab:
3p + 2b = 4.000
2p + 2b = 7.250
____________ -
p = -3.250
Harga selalu positif.
soalnya mohon dikoreksi ulang.