2 answers:
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.
M+n+3+m+n+4
=3m+2n+7
answer
C. 3m+2n+7
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