Question

Tim has a large collection of books. The number of paperback books he owns is three less that four times the number of hard cover books. In total, Tim has 447 books. How many hard cover books does he own?


A). 90
B). 100
C). 110
D). 120

Answer 1

Assume x = paperbook, y = hard cover books

x = 4y-3

$4y - 3 + y = 447 \\ 5y = 450 \\ y = 90$
The answer is A. 90

Hope this helps. - M