Scrii a si c in functie de b. Asa
a=[tex] \frac{b}{4} [/tex]
c=b+5
Acum inlocuiesti a si c in a+b+c=986
[tex] \frac{b}{4} [/tex]+b+b+5=986
[tex] \frac{b}{4} [/tex]+2b=981
Amplifici cu 4
b+8b=3924
9b=3924
b=436
De aici inlocuiesti si afli
a=[tex] \frac{b}{4} [/tex]=[tex] \frac{436}{4} [/tex]=109
c=b+5=436+5=441
