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Math Help - Totally baffled

  1. #1
    andyc209
    Guest

    Totally baffled

    I have an algebra problem where I need to find X, hopefully someone can help as I cannot see the wood for the trees on this one.

    THanks for any help anyone

    X - ((0.2*X) + (0.3*X)) = 100

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  2. #2
    Member
    Joined
    Aug 2007
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    144
    "I cannot see the wood for the trees." Nice expression ^^

    X-((0.2X)+(0.3X))=100

    \implies X(1-(0.2+0.3))=100

    \implies X=\frac{100}{(1-(0.2+0.3))}

    \implies X=\frac{100}{0.5}

    \implies X=200
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  3. #3
    Super Member
    Joined
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    Santiago
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    517
    Quote Originally Posted by Sean12345 View Post
    "I cannot see the wood for the trees." Nice expression ^^

    X-((0.2X)+(0.3X))=100

    \implies X(1-(0.2+0.3))=100

    \implies X=\frac{100}{(1-(0.2+0.3))}

    \implies X=\frac{100}{0.5}

    \implies X=200
    just in-regards to your answer, why did u remove the X's and place a 1 before the additions ?
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  4. #4
    Member
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    Aug 2007
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    Good point actually. I don't really know why i did that come to think of it. I'll just say i was giving an insight into how he would do harder questions of the same principal.
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