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3m + 2j = 33.000 ( X2) 6m + 4j = 66.000
================================= -
5m-6m +4j-4j = 60.000 - 66.000
-m = -6.000
harga 1 kilogram mangga = -6000/-1 = Rp. 6.000,oo
maka
5a + 4b = 60.000 (1)===> × 3
3a + 2b = 33.000 (2) ===> × 5
mnjadi
15a + 12b = 180.000
15a + 10b = 165.000
----------------------------- -
0 + 2b = 15.000
2b = 15.000
b = 15.000/2
b = 7500 ===> masukkan persamaan 1
5a + 4b = 60.000
5a + 4. 7500 = 60.000
5a + 30.000 = 60.000
5a = 60.000 - 30.000
5a = 30.000
a = 30.000 / 5
a = 6000
maka harga mangga (a) = 6000/kg dan harga jeruk (b) = 7500/kg