Question

Brandy has a collection of comic books. If she adds 15 to the number of comic books in her collection and
multiplies the sum by 3, the result will be 65 less than 4 times the number of comic books in her collection. How
many comic books are in her collection?

Answer 1

let the collection of comic books be x.
4 times the number of comic books in her collection = 4x

3( x + 15 ) = 4x - 65
3x + 45 = 4x - 65
45 + 65 = 4x - 3x ( move all the similar variables to one side of the equation )
x = 110

ans : 110