Question

x , y , z numere prime

2x +y + z = 13

Answer 1

suma y+z trebuie sa fie impara, asta inseamna ca:
y=par, z=impar, y=2, 2x+2+z=13, 2x+z=11, x=3, z=5
z=par, y=impar, z=2, 2x+y+2=13, 2x+y=11, x=3, y=5
prin urmare avem variantele:
3,2,5 si 3,5,2