advance functions

will someone please help me with the question i posted earlier ? :(

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  1. log2=log(x+5)-1

    log 2 - log (x+5) = -1

    log (2/(x+5)) = -1

    10^log (2/(x+5)) = 10^-1 = 0.1

    so
    2/(x+5) = 0.1
    2 = .1 x + .5
    1.5 = .1 x
    x = 15

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    posted by Damon
  2. oh right on! thanks!

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    posted by oranges
  3. You are welcome :)

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    posted by Damon

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