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Cel mai inteligent răspuns!
2014-11-03T11:28:54+02:00


(a+a*10%+a*20%):3=26, de unde (a*(1+10:100+20:100)):3=26

a*(100:100+10:100+20:100)=3*26

a*1/100*(100+10+20)=78

a*1/100*130=78

a*130=78*100

a=7800/130

a=60


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