A set of stickers was shared among Dan, Hamid and Rita. Dan received 2/5 of the stickers and Hamid received 3/10 of the stickers. The remaining stickers were given to Rita. If Rita received 8 fewer stickers than Dan, how many stickers were there in the set?
If there were x stickers, then
d = 2/5 x
h = 3/10 x
x - (d+h) = d-8
solve to get x = 80
check to be sure.