Answer:
9/13
Step-by-step explanation:
7/13 + 2/13= 9/13
c = -2
4(3+c)+c=c+4 =
4(3+c)+c-c=c+4-c =
4(3+c)=4 =
[4(3+c)]/4=4/4 =
3+c=1 =
3+c-3=1-3 =
Answer: it is the one with c