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Math Help - Solving the equation for an IN/OUT table

  1. #1
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    Solving the equation for an IN/OUT table

    This is the In/Out table I've been given:

    In|Out
    3|8
    5|12
    9|20
    15|32
    X|?

    Should the bottom of the In/Out table be 2(X + 1) OR 2X + 2? Or are both equations correct? Or are neither correct? This is a problem I'm not sure about. 2X + 2 seems to work but I'm not sure about the other one. Thanks for your advice.
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  2. #2
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    Quote Originally Posted by Sarah- View Post

    Should the bottom of the In/Out table be 2(X + 1) OR 2X + 2? Or are both equations correct?
    both are correct because they are the same equation


    2(X + 1)

    2\times X +2\times  1

    2X +2
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