Question

Determinati nr. prime a si b stiind ca 7a+16b=94

Answer 1

7a+16b=94;
⇒2/94⇒16b-numar par ,pentru orice b∈N;
⇒2/16b;
⇒2/7a;⇒a-numar prim natural;
⇒a=2⇒7·2=14⇒14-multiplu de 2;
⇒14+16b=94⇒16b=80⇒b=5⇒numar prim;
⇒a=2;⇒b=5;