Negative 16 less than the quotient of a number and 2 is 34

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?

He concluded that a heavier object dropped from the same height as a lighter object will land

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?