Respuesta :

gmany
[tex]-5\dfrac{7}{12}-\left(-\dfrac{7}{30}\right)=-5\dfrac{7}{12}+\dfrac{7}{30}=-5\dfrac{7\cdot5}{12\cdot5}+\dfrac{7\cdot2}{30\cdot2}\\\\=-5\dfrac{35}{60}+\dfrac{14}{60}=-5\dfrac{21}{60}=-5\dfrac{21:3}{60:3}=-5\dfrac{7}{20}[/tex]