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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?

  • Math -

    m = 2 d (initially)

    After Matt gives Dave 10, they have new amounts m' and d'.
    m' = 2 d - 10
    d' = d + 10

  • Math -

    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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