Rina dan santi pergi ke supermarket. Rina membeli lima kilogram apel dan satu kilogramjeruk seharga Rp.60,000,00. Santi membeli dua kilogram apel dan tiga kilog

misal
apel = x
jeruk = y

5x + y = 60.000 |×3
2x + 3y = 50.000
maka
15x + 3y = 180.000
2x + 3y = 50.000
---------------------------(-)
13x = 130.000
x = 10.000

subtitusi
2x + 3y = 50.000
2(10.000) + 3y = 50.000
20.000 + 3y = 50.000
3y = 50.000 - 20.000
3y = 30.000
y = 10.000

jadi harga
1 kg apel = 10.000
1 kg jeruk = 10.000