Respuesta :

choixongdong
m+n+3+m+n+4
=3m+2n+7

answer
C. 3m+2n+7
First lets simplify the equation by removing the parenthesis 

m + n + 3 + m + n + 4

Gather the like terms

(m + m) + (n + n) + (3 + 4)


Now simplify it add 3 + 4 so it can be 7


Answer: C) 2m + 2n + 7 or the third option.