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21 July, 08:37

Log2 (x+2) - log2 (x-5) = 3

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  1. 21 July, 11:32
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    x=3

    Explanation:

    log2 (x+5) - log2 (x-2) = 3

    combine the log terms as follows

    log2 (x+5 x-2) = 3

    then by definition

    (x+5 x-2) = 23 = 8

    then some algebra

    x+5=8x-16

    7x=21, x = 3
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