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Math Help - Which steps to use and when to use them ? ?

  1. #1
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    Which steps to use and when to use them ? ?

    Alright, so.. I'm currently confused when it comes to solving simple eqautions like


    11n = 10n + 21

    or

    17z = 16z + 8

    or even

    -36 = y + 12


    I dont need to know how to do those problems, but I need to know when to do what.
    Like in the first equation, Do I use division? subtraction ? addition ? What type of equations do I use what kind of operators.
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  2. #2
    MHF Contributor Siron's Avatar
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    Re: Which steps to use and when to use them ? ?

    If you have the equation:
    11n=10n+21
    We want the variable n in one side and the constants in the other side.
    First (and only) step: subtract 10n of every side:
    11n-10n=10n+21-10n
    \Leftrightarrow n=21

    Try the others.
    Last edited by Siron; September 18th 2011 at 10:12 PM.
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