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2 salak = 2 x 7.000
= 14.000
jeruk (j)
3s + 2j = 39000 (i)
4s + 3j = 55000 (ii)
operasi (i) dikalikan 3
operasi (ii) dikalikan 2
menjadi
9s + 6j = 117.000
8s + 6j = 110.000
________________ -
s = 7000
2s = 2 x 7000
2s = 14000