Fie a,b,x ∈ N,astfel incit a=7x+15 ,b=5x+35.aflati x stiind ca a/b si b/a


Răspuns :

7x+15 \ 5x+35; 7x+15=5x+35; 7x-5x= 35-15; 2x=20; x= 10; 7•10+15 \ 5•10+35=70+15 \ 50+35= 85 \ 85 a \b = b \ a, nu stiu sigur daca e corect exercitiul ,succes