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Misalkan harga satu buku = b
4b + 3p = 13.500 |×2| 8b + 6p = 27.000
3b + 2p = 9.750 |×3| 9b + 6p = 29.250
-b = -2.250
b = 2.250
4b + 3p = 13.500
4(2.250) + 3p = 13.500
9.000 + 3p = 13.500
3p = 13.500 - 9.000
3p = 4.500
p = 1.500
2b + 3p = 2(2.250) + 3(1.500)
= 4.500 + 4.500
= 9.000
Jadi jawabannya adalah D. Rp 9.000,00
Misalkan harga satu pensil = p
Misalkan harga satu buku = b
4b + 2p = 13.000
3b + p = 9.000
p = 9.000 - 3b
4b + 2p = 13.000
4b + 2(9.000 - 3b) = 13.000
4b + 18.000 - 6b = 13.000
4b - 6b = 13.000 - 18.000
-2b = -5.000
b = 2.500
3b + p = 9.000
3(2.500) + p = 9.000
7.500 + p = 9.000
p = 9.000 - 7.500
p = 1.500
5b + 2p = 5(2.500) + 2(1.500)
= 12.500 + 3.000
= 15.500
Jadi jawabannya adalah yang D. Rp 15.500,00.
sorry kalo lama
internet nya gangguan