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7 va rog!!! dau 50 de pct!!!

7 Va Rog Dau 50 De Pct class=

Răspuns :

Răspuns:

[tex]a+b+c=502\\\\b=3a\\\\c:b=7rest2= > c=7b+2= > c=21a+2\\\\a+3a+21a+2=502\\\\25a=502-2= > a=500:25= > a=20\\\\b=3*20= > b=60\\\\c=21*20+2= > c=422[/tex]