dave collected 30% more stamps than John. dave gave away 15% of his stamps while john gave away 60% of his stamps. John had 282 fewer stamps than dave in the end .how many stamps did dave have at first.
+37146 d = dave original # = 1.3 j
dave gives away 15% leaving 85% of 1.3j = (.85)(1.3)(j)
j gives away 60% leaving 40% .4 j left
(.85)(1.3)(j) = 282 + .4j
1.105 j = 282 + .4j
.705j = 282
j = 400 originally then dave had 1.3 (400) = 520
