Answer:
its 3:5
Step-by-step explanation: if you don't see the answer talk with your teacher because I did it and I got 3:5
The answer would be 18 because if you put 3a+6a+a=180 (the degrees of a triangle) and solve it a becomes 18
if those are fractions being five and two thirds etc... I believe it would be 17/6. if you convert to improper fractions and then get a common denominator to subtract that should do it. Hope that helps.
