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2 April, 05:47

F (x) = - 2x + 9, find x if f (x) = 23

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  1. 2 April, 05:48
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    x = - 7

    Step-by-step explanation:

    f (x) = - 2x + 9

    f (x) = 23

    therefore, f (x) =

    -2x + 9 = 23

    -2x = 23 - 9

    -2x = 14

    -x = 14 : 2

    -x = 7

    x = - 7
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