Wendy and joyce had the same amount of money. wendy spent $960 while joyce spent $2,500. in the end, wendy had 3 times as much money left as joyce. how much money did each of them have at first?

As a self-employed seamstress, you know that it takes 7 yards of material to make 3 jackets. you bought 15 yards of material to make 7 jackets. did you buy enough material? if not, how much were you over or under?