Problema Solution
troy decided to give away some of his CDs. He gave a fourth of his CDs to Todd. Then he gave half of the remaining CDs to Ryan. Troy is left with 6CDs, how many did he have in the beginning.
Answer provided by our tutors
let 'x' represent the number of CDs Troy had in the beginning
x = x/4 + x/2 + 6
solving for 'x' we have x=24
Troy had 24 CDs in the beginning
correction to the problem!
the half he gave to Ryan came from (x-x/4), therefore we have:
x = x/4 + (x-x/4)/2 + 6
solving for 'x' we have x=16
Troy had 16 CDs in the beginning