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2x + 3y = 6000
4x - y = 5000 dikalikan -3 semua jadi -12x + 3y = -15000
2x + 3y = 6000
-12x + 3y = -15000 dikurangkan dari 2 persamaan diatas
jadi hasilnya
14x = 21000
x = 1500 masukkkan x ke persamaan 2
4x - y = 5000
4(1500) - y = 5000
6000 - y = 5000
-y = -1000
y = 1000
x = 1500 dan y = 1000
jadi 5x + 2y = 5(1500) + 2(1000) = 7500 + 2000 = 9500