Răspunsuri

2014-02-15T08:45:39+02:00
Din a+4b=2b+c, si c=120⇒a+4b=120
Acum a+4b+5c-719=120+5·120-719=1
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  • Utilizator Brainly
2014-02-15T10:10:26+02:00
E=a+4b+5c-719,daca a+6b=2b+c,iar c=120
a+6b=2b+c,  a+6b-2b=c,    a+4b=c , a+4b=120
E=(a+4b)+5c-719=120+5*120-719=120+600-719=1
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