Respuesta :
Answer:
9m+4n
Step-by-step explanation:
this equation, according to me, can be written in two other ways
(3m+5n) - (-6m+n) or 3m+5n-n+6m (this is the same equation without the parenthesis and it is distributed
3m+5n-n+6m= 9m+4n
6+3=9
5-1=4