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Jeruk = X
apel = Y
Jadi,
Ali = 3X + 2Y = 4500
Ardi = 2X + 2Y = 3500
Gunakan eliminasi:
3X + 2Y = 4500
2X + 2Y = 3500
-------------------------- (-)
X = 1000 (Harga Jeruk = Rp. 1.000,-)
dan,
2X + 2Y = 3500
2(1000) + 2Y = 3500
2000 + 2Y = 3500
2Y = 3500 - 2000
2Y = 1500
Y = 1500/2
Y = 750 (Harga Apel = Rp. 750,-)
jika rudi membeli 5 jeruk dan 3 apel maka:
= 5X + 3Y
= 5(1000) + 3(750)
= 5000 + 2250
= 7250
Harus membayar Rp. 7.250,-
Semoga membantu!!!