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Math Help - help with very small equation

  1. #1
    Newbie
    Joined
    Nov 2008
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    6

    help with very small equation

    i have
    .50x+80=.-80x=68

    do i need to subract the negative .8x from the .5x or the other way around

    or do i need to subract 68 from 80 and get 12
    but after i geat 12 i will need to divide by -.30x and my answer will be negative for my problem and it wont make any sense
    apreciate any help
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  2. #2
    Junior Member
    Joined
    Sep 2008
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    63
    can you rewrite the equation a bit neater please.

    because what im getting from it is:

    <br /> <br />
0.50x + 80 = -0.80x = 68<br />

    ... :/
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  3. #3
    Newbie
    Joined
    Nov 2008
    Posts
    6

    sorry

    i meant to say
    .5x + 80 +.-80x =68
    what are steps i need to do?
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  4. #4
    Junior Member
    Joined
    Sep 2008
    Posts
    63
    Equation:

    <br />
0.5x + 80 - 0.8x = 68<br />

    Combine Like Terms:

    <br />
80 - 0.3x = 68<br />

    Move The Constant To The Other Side:

    <br />
-0.3x = -12<br />

    Divide Through By -0.3:

    <br />
x = 40<br />

    Understand?
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