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Math Help - Please help me with my trigo assignment.

  1. #1
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    Smile Please help me with my trigo assignment.

    HI Everyone,

    Please help me to find X in this problem. I attach a file for the drawing. Thanks in Advance.. It is about Similar triangle.
    Attached Files Attached Files
    Last edited by john edgar; August 4th 2008 at 04:53 AM. Reason: for clarification
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  2. #2
    MHF Contributor red_dog's Avatar
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    The great triangle and the little triangle are isosceles. So we have the following system:

    \displaystyle\left\{\begin{array}{ll}x-2y=x-5\\2x-3y=15\end{array}\right.

    From the first equation we get y=\frac{5}{2}

    Plug y in the second and find x.
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