Question

resolva aeasquações
a) 2(n+5)=16
b) 3(n-4)= 10​

Answer 1

$\begin{matrix} \underbrace{ \ PRODUTOS \ \ NOTAVEIS : \ \ } \\\\ \\\\ A) \ \ 2 \ (n \ + \ 5) \ \ = \ \ 16 \ \ \ \ \ \ \ \ \ \ B) \ \ 3 \ (n \ - \ 4) \ \ = \ \ 10 \\\\\ 2n \ + \ 10 \ \ = \ \ 16 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 3n \ - \ 12 \ \ = \ \ 10 \\\\ 2n \ \ = \ \ 16 \ - \ 10 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 3n \ \ = \ \ 10 \ + \ 12 \\\\ \end{matrix}$  

   $2n \ \ = \ \ 6 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 3n \ \ = \ \ 22 \\\\ \boxed{ \ n \ \ = \ \ 3 \ } \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \boxed{ \ n \ \ \approx \ \ 7,3 \ }$