I think you forgot to mention Susan's current age if not:
x+5
x-4
6x
You just divide each side of the equation by three so you'll get

Edit: I believe you wrote the equation wrongly. If it was

, then you cubic root both sides and get

.
Your answer is healthcare insurance
Answer:
37.5%
Step-by-step explanation:
= 0.375
0.375 X 100 = 37.5%