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Math Help - weird fraction problems...double fractions?

  1. #1
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    Smile weird fraction problems...double fractions?

    Is 1/3 a solution of z+4/2-z=13/5?
    Is 13/4 a solution of x+6/x-2=37/5?
    please show me how these problems are done because i have no idea where to start. thank you.
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  2. #2
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    Have you tried substitution?

    "Is 1/3 a solution of z+4/2-z=13/5?"

    (1/3) + 4/2 - (1/3) = (1/3) + 2 - (1/3) = (1/3) - (1/3) + 2 = 2 Nope!

    Now, if you meant \frac{z+4}{2-z} = \frac{13}{5}, that would be different, but that is not what you wrote.

    Use more parentheses and remember the "Order of Operations". These things matter. Don't ignore them.
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  3. #3
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    i have the answers

    thanks for trying but in the back of the book it says that it is a solution and you said no its not. but thanks for trying!
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  4. #4
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    Answer to the question

    If you look at how TKHunny wrote the second part.

    \frac{z+4}{2-z} = \frac{13}{5}

    Multiply both sides by 2-z and 5

    (z+4)*5 = (13)*(2-z)

    Gives

    5z + 20 = 26 -13z

    Collect the Z's on one side, so add 13z to both sides and subtract 20 to both sides.

    leaves you with 18z = 6

    z = 6/18 which can be simplfied into 1/3.

    I dont know how to set out the fractions like TKHunny has done though!
    Last edited by Broadhallian; July 16th 2008 at 01:57 PM.
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  5. #5
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    If you want to see how the math script is written, all you have to do is quote someone and you will see their LaTeX script in the math /math tags. The command for writing a fraction is \frac{numerator}{denominator}. To put something in math tags, use the math tags button, which appears as a capital letter sigma or summation symbol. Alternatively, you can write the math tags yourself; just don't forget the brackets.
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  6. #6
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    Quote Originally Posted by abb1327 View Post
    thanks for trying but in the back of the book it says that it is a solution and you said no its not. but thanks for trying!

    ** Crusade Alert **

    1) The back of the book is no substitute for either thinking or for showing your work.

    2) You have shown no work. There is none who knows how to help you. Only guessing is available to those who would help if they could.

    3) I gave you two options. You barely looked at one of them and then quit. Not good enough.

    4) I encouraged you to upgrade your communication skills. You showed no effort to do so. Not good enough.

    5) If you want to learn some mathematics, you ARE going to have to step up your game. Waiting for others to do your homework will not be beneficial on an exam.

    ** End of Crusade **
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