x+y+z=79
x/y =3 r 6 ; x=3y+6
z=x-y /2 ; z= 3y+6 -y /2 ; z =2y +6 /2 ; inlocuim pe x si z in prima relatie
3y+6 +y +2y +6 /2 numitor 2
6y +12+2y +2y+6 =158
10y =158-12-6
10y =140
y =14
x =3y+6
x =3*14+6
x =42+6 =48
z =2y+6/2
z =2*14+6 /2 =28+6/2 =34/2 =17
verif ; 48+14+17=79
