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harga jeruk = x
harga apel = y
maka :
5x + 3y = 14.000 ............dikali 2
2x + 5y = 17 .000 ...........dikali 5
menjadi :
10x + 25y = 85.000
10x + 6y = 28.000 -
19y = 57.000
y = 3.000
jadi harga sebuah apel =Rp 3.000
subtitusi nilai y :
5x + 3(3000) = 14.000
5x = 14.000 - 9.000
x = 5.000/5
x = 1.000
harga jeruk = 1.000
2j + 5a = 17.000 dikalikan 5
mrnjadi
10j + 6a = 28.000
10j + 25a = 85.000 _
-19a = -57.000
a = -57.000/-19
a = 3.000
harga 1 apel = 3.000