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4x + 3y = 47.000
Disamakan bilangan x-nya
20x + 6y = 46.000
20x + 15y = 235.000
Dikurangi
-9y = -189.000
y = 21.000 (melon)
Mencari x
20x + 6y = 46.000
20x + 126.000 = 46.000
x = -4000 (apel)
5x + 3y = 5 (-4000) + 3 (21.000)
= -20.000 + 63.000
= 43.000