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Math Help - solve fractions

  1. #1
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    solve fractions

    2x+3/5=9

    -30=2x^-1

    32=4/6x-34


    4x-5x=3-5+6x
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  2. #2
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    Quote Originally Posted by jerryramos View Post
    -30=2x^-1
    -30 = \frac{2}{x}

    -30 \cdot x = \frac{2}{x} \cdot x

    -30x = 2

    \frac{-30x}{-30} = \frac{2}{-30}

    x = -\frac{1}{15}

    -Dan
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  3. #3
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    Quote Originally Posted by jerryramos View Post
    32=4/6x-34
    Is this
    32 = \frac{4}{6x} - 34
    or
    32 = \frac{4}{6x-34}

    I'm going to guess it is the second one.
    32 = \frac{4}{6x-34}

    30 \cdot (6x-34) = \frac{4}{6x-34} \cdot (6x-34)

     30(6x-34) = 4

    180x - 1020 = 4

    180x - 1020 + 1020 = 4 + 1020

    180x = 1024

    \frac{180x}{180} = \frac{1024}{180}

    x = \frac{256}{45}

    -Dan
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  4. #4
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by jerryramos View Post
    4x-5x=3-5+6x
    4x - 5x = 3 - 5 + 6x

    -x = -2 + 6x

    -x - 6x = -2 + 6x - 6x

    -7x = -2

    \frac{-7x}{-7} = \frac{-2}{-7}

    x = \frac{2}{7}

    -Dan
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  5. #5
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by jerryramos View Post
    2x+3/5=9
    What is this? Is it
    \frac{2x+3}{5} = 9?

    If so:
    \frac{2x+3}{5} \cdot 5 = 9 \cdot 5

    2x + 3 = 45

    2x + 3 - 3 = 45 - 3

    2x = 42

    \frac{2x}{2} = \frac{42}{2}

    x = 21

    -Dan
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  6. #6
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    I need help with this one

    32=4/6 (x)-34
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  7. #7
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    Quote Originally Posted by jerryramos View Post
    32=4/6 (x)-34
    Hello,

    I assume that you mean:

    32=\frac{4}{6} x-34. Add 34:

    66=\frac{4}{6} x. Divide by \frac{4}{6}

    x = 99

    EB
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