Question

Determina numerele prime a,b, care verifica relatia 3a+2b=16

Answer 1

16-numar par⇒2b-numar par⇒b-numar prim;
⇒3a-numar par⇒a-numar ⇒a=2[numar prim par];
⇒3·2=6;
⇒6+2b=16
⇒2b=10⇒b=5[numar prim];
⇒a=2;
⇒b=5;