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Sovling 4 equations with 4 uknowns for equilibrium

  1. Nov 8, 2011 #1

    aub

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    i know this doesnt fit here right but i didnt know where else i could ask this

    1. The problem statement, all variables and given/known data

    153nosi.jpg


    how did they solve 1 through 4? it should be easy but i cant solve it :frown:

    thanks for any help
     
  2. jcsd
  3. Nov 8, 2011 #2

    phyzguy

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    Science Advisor

    You want to manipulate the equations to eliminate variables. For example, what happens if you add equations (1) and (3) together? Try this and see if you can proceed further.
     
  4. Nov 11, 2011 #3

    aub

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    ok thanks i solved it
     
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