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  • Mar 13, 2009, 08:37 AM
    math_dude16
    Elimination in Algebra
    Could someone please help me! This problem with elimination not SUBSITUTION:

    Nn+ Nd= 50
    5Nn+10Nd= 450
  • Mar 13, 2009, 01:16 PM
    galactus
    N is a constant and n and d are the variables.




    Multiply the top equation by -5. See why? We have to find a number that eliminates a variable. In this case, -5+5=0. So, we have:




    Add them:





    Now, you find n.
  • Mar 13, 2009, 06:57 PM
    asastring

    5Nd = 200
    d=40/N

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