Respuesta :

gmany

Answer:

B. n = m - a

Step-by-step explanation:

[tex]a=m-n\qquad\text{subtract}\ a\ \text{from both sides}\\\\a-a=m-n-a\\\\0=m-n-a\qquad\text{add}\ n\ \text{to both sides}\\\\0+n=m-n+n-a\\\\n=m-a[/tex]