Răspunsuri

2014-10-16T17:12:16+03:00
1)    ab+ac+a=749
        a(b+c)+1=749
         a*106+1=749
         a*107=749
          a=749:107
          a=7
5 3 5
2014-10-16T17:13:16+03:00
A)ab+ac+a=a(b+c+1)=107a=749=>a=7b)2b+2c=99-a=>3a+99-2=2a+99=45=>a=-27
=>2b+2c=99+27=126=>2a+2b+2c=126-54=72


Eu nu am facut asa ceva
adica?
am uitat. la final dai factor comun 2 si=>a+b+c=36
=> e rezulta, nu mai mare sau egal