Which means the sum of w and 3.4 is greater than or equal to 10.5?

Cam bought some used books for $4.95. he paid $0.50 each for some books and $0.35 each for the others. he bought fewer than 8 books at each price. how many books did cam buy?

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents