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5x + 2y = 50.000 (×3) 15x + 6y = 150.000
1x + 3y = 23.000 (×2) 2x + 6y = 46.000
15x + 6y = 150.000
2x + 6y = 46.000_
13x = 104.000
x = 104.000/13
x = 8.000
5x + 2y = 50.000
5(8.000) + 2y = 50.000
40.000 + 2y = 50.000
2y = 50.000 - 40.000
2y = 10.000
y = 10.000/2
y = 5.000
jadi harga 1 apel = 8.000 dan 1 jeruk = 5.000
5a + 2j = 50000
a + 3j = 23000
ditanya :
harga a dan j?
dijawab:
a = 23000 - 3j
5a + 2j = 50000
5(23000-3j) + 2j = 50000
115000 - 15j + 2j = 50000
-13j = 50000 - 115000
j = -65000/(-13)
j = 5000
a = 23000 - 3j
a = 23000 - 3.5000
a = 23000 - 15000
a = 8000