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K = Kaset
4C + 5K = 200.000 x 1
2C + 3K = 110.000 x 2
4C + 5K = 200.000
4C + 6K = 220.000
Jika dikurangi maka tinggal 1K = 20.000
maka 4C + 5x20.000 = 200.000
4C + 100.000 = 200.000
4C = 200.000 - 100.000
4C = 100.000
C = 25.000
hasil dari 6C + 5K adalah
(6 × 25.000) + (5 × 20.000)
hasilnya 250.000
compact disc = C
kaset = K
4C +5K = 200.000 | x1| 4C + 5K = 200.000
2C + 3 K = 110.000 |x2| 4C + 6 K = 220.000
------------------------- -
- K = - 20.000
K = 20.000
2C + 3K = 110.000
2C + 3(20.000) = 110.000
2C + 60.000 = 110.000
2C = 110.000 - 60.000
2C = 50.000
C = 25.000
harga = 6C + 5K
= 6 ( 25.000) + 5(20.000)
= 250.000