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x - 60 %
x = 60 x 24,5/ 100 = 14,7
24,5 - 14,7 = 9,8
9,8 : 2 = 4,9 - jabłka pozostałe 3 dnia
4,9 - 6,86
1 - x
x = 6,86/4,9 = 1,4 - cena kilograma jabłek