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Is this Simplified Correctly?? Algebraic Expression.. Please Help!!

  • 28-08-2011 5:57pm
    #1
    Sagittarius
    Registered Users, Registered Users 2 Posts: 15 ✭


    Studying for an exam..would really appreciate some help

    For part of the question I have to simplify this:

    P=10-{(10-c)/2 }

    Sorry if that's not entirely clear, its just simply "P equals 10 MINUS 10-c over 2

    How does that work? Common Denominator? If someone could explain how you simplify it it would be amazing.

    I know it's quite basic but I'm just not sure.. keep doubting myself..The rest of the question is all wrong if I don't have this one right!


Comments

  • #2
    **Timbuk2**
    Moderators, Education Moderators, Motoring & Transport Moderators Posts: 7,396 Mod ✭✭✭✭**Timbuk2**


    What you have is
    [latex]P=\displaystyle{10-(\frac{10-c}{2})}[/latex]
    To simplify, you want to express as one fraction. The least common denominator in this case is 2, so the above can be rewritten as.
    [latex]P=\displaystyle\frac{20-10+c}{2}[/latex] (note it's +c, as two minuses multiply to give a +)
    which is just:
    [latex]P=\displaystyle\frac{10+c}{2}[/latex]


  • #3
    Sagittarius
    Registered Users, Registered Users 2 Posts: 15 ✭Sagittarius


    Thanks Timbuk2!

    That's crystal clear to me now, much appreciated. :)


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