Question

resolva a equação no espaço a abaixo . a) 4(x-5)+10= 5 (7+2x).​

Answer 1

$\begin{matrix} \underbrace{ \ \ Distributiva: \ \ } \\\\ 4 \ (x \ - \ 5) \ + \ 10 \ \ = \ \ 5 \ (7 \ + \ 2x) \\\\ 4x \ - \ 20 \ + \ 10 \ \ = \ \ 35 \ + \ 10x \\\\ 4x \ - \ 10x \ \ = \ \ 35 \ - \ 10 \ + \ 20 \\\\ -6x \ \ = \ \ 45 \\\\ x \ \ = \ \ -\frac{45}{6} \\\\ \boxed{ \ x \ = \ \ -7,5 \ } \end{matrix}$