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100l 5%
100l+100l=200l
3,5%+5%=8,5%
8,5:200=0,0425=4,25%
100 l*5%=5 l
100+100=200
3,5+5=8,5
8,5/200=0,0425= 4,25%
Odp. Otrzymano ocet 4,25%