15%z 60---0,15x60=9
5%z9----0,05x9=0,45
9-0,45=8,55-szukana liczba
15%=0,15
5%=0,05
60*0,15-0,05*0,15*60=9-0,45=8,55
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15%z 60---0,15x60=9
5%z9----0,05x9=0,45
9-0,45=8,55-szukana liczba
15%=0,15
5%=0,05
60*0,15-0,05*0,15*60=9-0,45=8,55