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Math Help - ln help please

  1. #1
    Newbie
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    ln help please

    Can someone walk me through this?

    Solve for x using using natural logarithms. Answer should be in decimal approximations rounded to the nearest thousandth.

    3 ∙ 7^x = 2 ∙ 5^x
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  2. #2
    Senior Member
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    Nov 2008
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    Hey

    Quote Originally Posted by Humbled_by_math View Post
    Can someone walk me through this?

    Solve for x using using natural logarithms. Answer should be in decimal approximations rounded to the nearest thousandth.

    3 ∙ 7^x = 2 ∙ 5^x
    using ln

    ln(3) + x * ln(7) = ln(2) +ln(5)x

    solve for x and you get

    x = -1.205...

    Rapha
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  3. #3
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    Thank you.
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