Answer:
the first one
4 3/5
Step-by-step explanation:
6 3/4-2 3/20=x
3/4=15/20
15/20-3/20=12/20=6/10=3/5
6-3=3+3/5=4 3/5
The answer is <DOE
<DOE + <COD = A straight LINE, a.k.a, a LINEar pair