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  1. #1
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    Need to solve X

    15000*1,02^x = 12000*1.035^x


    Thank you in advance
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  2. #2
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    e^(i*pi)'s Avatar
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    Quote Originally Posted by Makron View Post
    Need to solve X

    15000*1,02^x = 12000*1.035^x


    Thank you in advance
    Divide by 12000

    \frac{5}{4}(1.02^x) = 1.035^x

    ln \left(\frac{5}{4} \times 1.02^x \right) = x\,ln(1.035)

    ln(1.25) = x\,ln(1.035) - x\,ln(1.02) = x(ln(1.035)-ln(1.02))

    x = \frac{ln(1.25)}{ln(1.035-ln(1.02))}
    Last edited by e^(i*pi); October 12th 2009 at 12:32 PM. Reason: closing bracket
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  3. #3
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    x=1.52851
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  4. #4
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    e^(i*pi)'s Avatar
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    Quote Originally Posted by melvis View Post
    x=1.52851
    I get 15.3 (3sf)
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