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Math Help - Finding LCD

  1. #1
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    Finding LCD

    Hello

    I have a problem I need help with. I'm not sure if I am doing the problem right and my answer book only has odd numbers...

    I'm supposed to find the LCD for 1/6y and 3x/4y+12 ...I'm getting 12(y+3) for the LCD but I'm confused about it. According to my logic it could also be 12y(y+3) and my friend is telling me its supposed to be 24(y+3)...Does anyone know the right answer to this?

    Appreciate the help. )
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by Birgit View Post
    Hello

    I have a problem I need help with. I'm not sure if I am doing the problem right and my answer book only has odd numbers...

    I'm supposed to find the LCD for 1/6y and 3x/4y+12 ...I'm getting 12(y+3) for the LCD but I'm confused about it. According to my logic it could also be 12y(y+3) and my friend is telling me its supposed to be 24(y+3)...Does anyone know the right answer to this?

    Appreciate the help. )
    Hi Birgit,

    Find the LCD for \frac{1}{6y} \ \ and \ \ \frac{3x}{\underbrace{4y+12}_{4(y+3)}}

    So your LCD is, in fact, 12y(y+3)
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  3. #3
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    Hello,


    First of all your LCD should be divisible with 6y and with 4y+12; your answer 12(y+3) and your friend's answer 24(y+3) are not divisible with 6y.

    The correct answer is 12y(y+3) because it is divisible with both 6y and 4y+12 and

     LCM[\frac{12y(y+3)}{6y};\frac{12y(y+3)}{4y+12}]=LCM[2(y+3);3]=1;


    Have a nice day,

    Hush_Hush
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  4. #4
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    Thank you!!!
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