Posted by Al on Tuesday, April 24, 2012 at 12:04pm.
The ratio of A's stickers to B's stickers was 3:4.
After A bought another 18 stickers and B lost 10 stickers, the ratio became 3:2. Find the number of stickers both of them had at first.

math  Steve, Tuesday, April 24, 2012 at 12:09pm
a/b = 3/4
(a+18)/(b10) = 3/2
4a = 3b
2(a+18) = 3(b10)
2a+36 = 4a  30
2a = 66
a = 33
b = 44
check:
33/44 = 3/4
(33+18)/(4410) = 51/34 = 3/2

math  Al, Tuesday, April 24, 2012 at 12:15pm
Thank you, Steve!

math  Steve, Tuesday, April 24, 2012 at 12:23pm
aw, shucks <scuff><scuff>
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