Question

Aflati n apartine N daca 3n+5 pe 2n+1 si 5 pe 3 sunt echivalente

Answer 1

$\frac{3n+5}{2n+1} = \frac{5}{3} =\ \textgreater \ 3(3n+5)=5(2n+1)=\ \textgreater \ 9n+15=10n+5 \ \textless \ =\ \textgreater$
$-n= -10 |*(-1)= n=10 =\ \textgreater \ n=10$