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1 pensil = Rp.4000
x = buku
y = pensil
3x + 2y = Rp. 26.000 .... (1)
2x + 3y = Rp. 24.000 .... (2)
Eliminasi x
3x + 2y = Rp. 26.000 |×2| 6x + 4y = Rp. 52.000
2x + 3y = Rp. 24.000 |×3| 6x + 9y = Rp. 72.000
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- 5y = - Rp. 20.000
y = Rp. 4.000
y = pensil = Rp. 4.000
Jadi harga 1 pensil ialah Rp. 4.000,00