Respuesta :
[tex]\bf -\cfrac{2}{3}+\cfrac{1}{3}\implies \stackrel{\textit{using an LCD of 3}}{\cfrac{-2+1}{3}}\implies -\cfrac{1}{3}[/tex]
[tex]\bf -\cfrac{2}{3}+\cfrac{1}{3}\implies \stackrel{\textit{using an LCD of 3}}{\cfrac{-2+1}{3}}\implies -\cfrac{1}{3}[/tex]