algebra

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suppose that D+E=A, that N/A=.25 and that D/A=0.15. Solve for N/E.

  • algebra -

    this one takes some "playing around"
    I did this

    D+E=A, divide each term by A
    D/A + E/A = A/A
    0.15 + E/A = 1
    E/A = .85 = 85/100 = 17/20
    Then A/E = 20/17

    But N/E = (N/A)(A/E) = (25/100)(20/17)
    = 5/17 or appr. .294

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