Odpowiedzi

2009-10-05T20:49:39+02:00
P1=a*b; P1-15=110%a*90%b;
P1-15=110a/100*90b/100;
P1-15=99ab/100;
ab-15=99ab/100;
ab-99/100=15;
ab*1/100=15;
ab=15*100;
P1=ab=1500m²;
P2=P1-15=1485m².
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