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Maka :
5x + 3y = 12.000
5x + 2y = 10.000 (dieliminasi nilai x) sehingga :
y = 2.000
nilai x :
5x = 10.000-2x
5x = 10.000 - 2(2.000)
5x = 6.000
x = 1.200
Maka harga satu 1 buku yaitu Rp. 2.000 dan harga 1 pulpen yaitu Rp. 1.200. Jika ditambah harga 1 buku dan 1 pulpen yaitu Rp. 3.200