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2,5x[14-7,5:(0,5x0,5+7x2)] rpd

Răspuns :

2,5*[14-7,5:(0,25+14)]=

2,5*[14-7,5:14,25] =

25/10*[14-75/10:1425/100] =

25/10*[14-75/10*100/1425] =

25/10*[14-10/19] amplificam pe 14 cu 19

25/10*[266/19-10/19] =

25/10*256/19 = 3200/95 = 640/19