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21 January, 12:19

12 + x = ? if x = 9 evaluate this expression

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  1. 21 January, 12:36
    0
    12 + x (9) = ?

    12 + 9 = 21
  2. 21 January, 12:39
    0
    If x = 9 you can replace the x in 12 + x with 9.

    12 + x = ?

    12 + 9 = ?

    12 + 9 = 21
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