\(
\def\period#1{ \overset{ \mmlToken{mo}{⏜}}{#1 } }
\def\periodd#1{ \overset{ \mmlToken{mo}{⏜}}{#1 \hspace{0.1cm}} }
\def\perioddd#1{ \overset{ \mmlToken{mo}{⏜}}{#1 \hspace{0.3cm}} }
\)
Calculando...
1.\(\ \ \ \)\( \displaystyle{ { { x } \over {x +6}} = { -1 \over {- x }} } \).
\( x=-2 \), \( x=3 \).
2.\(\ \ \ \)\( \displaystyle{ { -1 \over {- x +2}} = { { x -1} \over {x +7}} } \).
\( x=5 \), \( x=-1 \).