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Misal :
Buku = b
Pensil = p
Persamaannya adalah :
5b + 2p = 9.500
3b + 4p = 8.500
Dengan metode eliminasi akan diperoleh :
5b + 2p = 9.500 | x 2 | ⇒ 10b + 4p = 19.000
3b + 4p = 8.500 | x 1 | ⇒ 3b + 4b = 8.500 -
7b = 10.500
b = 10.500 : 7
b = 1.500
5b + 2p = 9.500
7.500 + 2p = 9.500
2p = 9.500 - 7.500
2p = 2.000
p = 2.000 : 2
p = 1.000
Harga buku = Rp 1.500
Harga pensil = Rp 1.000
Harga 2 buku = Rp 1.500 × 2
= Rp 3.000
Harga 3 pensil = Rp 1.000 × 3
= Rp 3.000
Harga total = Rp 3.000 + Rp 3.000
= Rp 6.000