Asked by Craig

Matt has twice as many stickers as David. If David has d stickers, and Matt gives David 10 stickers, how many stickers does each have in terms of d?
Answered by drwls
m = 2 d (initially)

After Matt gives Dave 10, they have new amounts m' and d'.
m' = 2 d - 10
d' = d + 10
Answered by Reiny
David: d stickers
Matt: 2d stickers

after give-away ...
David : d+10
Matt : 2d - 10


The question is not clearly stated.

Since you used the present tense throughout, one is forced to wonder if Matt "has" twice a many as David before or after the transfer.

I actually interpreted it as
Matt had twice .....
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