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    So I'm confused about something.
    Lets say I'm doing a question on simplifying fractions.
    What is the rule with multiplying a part of a fraction to cancel it down?
    Can I multiply the denominator or numeration?
    Here's a example: I have y(x-1)/1-x
    The answer is -y
    So can I assume that I can't multiply the denominator to simplify?
    Thanks!
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    (Original post by wcschstudent)
    So I'm confused about something.
    Lets say I'm doing a question on simplifying fractions.
    What is the rule with multiplying a part of a fraction to cancel it down?
    Can I multiply the denominator or numeration?
    Here's a example: I have y(x-1)/1-x
    The answer is -y
    So can I assume that I can't multiply the denominator to simplify?
    Thanks!
    Cannot multiply the denominator by what?
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    y(x-1)/(1-x)= (-y)(1-x)/(1-x)
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    I think the best way for you to think about this is to cancel common factors in the numerator and denominator. This may require you to do some factorization.

    eg \frac{y(x-1)}{(1-x)} = \frac{y(x-1)}{-(x-1)} = \frac{y}{-1} = -y
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    (Original post by Ateo)
    I think the best way for you to think about this is to cancel common factors in the numerator and denominator. This may require you to do some factorization.

    eg \frac{y(x-1)}{(1-x)} = \frac{y(x-1)}{-(x-1)} = \frac{y}{-1} = -y
    Ahh thanks!
 
 
 
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