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17 January, 18:40

When Aaliyah picks any number between 1 and 20, doubles it, adds 6, divides it by 2 and subtracts 3, she always gets the number she started with.

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  1. 17 January, 19:06
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    (2x + 6) : 2 - 3

    = 2 (x+3) : 2 - 3

    = x + 3 - 3

    = x
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