I believe you are referring to exponents that have a multiple of three. If so any number * three is a valid exponent in your case.
Let b be the initial amount of books. Steve sells half of his books, so the number of Steve's books become

Then, he buys 6 more, so the number increases by 6:

This number is now 14, so you have

Subtract 6 from both sides:

Multiply both sides by 2:

Answer:
5.76 Radians
Step-by-step explanation:
Answer:
126 gallons per minute
Step-by-step explanation:
No sé lo que quieres decir