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1 pensil = A
1 buku = B
B = 2A - 1.500
Kita ambil percobaan , A = 2.250
B = 2( 2.250 ) - 1.500
B = 4.500 - 1.500
B = 3.000
Harga 2 pensil dan 1 buku = 7.500
<=> 2A + B = 7.500
<=> 2( 2.250 ) + 3.000 = 7.500
<=> 4.500 + 3.000 = 7.500
Harga =
1 pensil = 2.250
1 buku = 3.000
Jadi, harga dari pensil adalah Rp. 2.250, oo
Jawabannya adalah D