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:

0 / 6 is equal to 0 because anything that divides 0 will always be zero but never if the problem is 6/0
Answer:
24
Step-by-step explanation:
PEMDAS: 15-14+23
1+23
24