Posted by Help please on Wednesday, July 30, 2014 at 3:06pm.
Brian gave 20% of his baseball cards to Scott and 15% to Adam. If he still had 520 cards, how many did he have originally?

Math  Steve, Wednesday, July 30, 2014 at 3:20pm
20% + 15% = 35% given away.
That leaves 65%, so
.65x = 520
Now just solve for x.