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Math Help - when p is equal

  1. #1
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    when p is equal

    I have these two equations:

    D0 - dp
    S0 + sp

    find value p, such that supply and demand is equal.

    My assumption is to set p - p = 0, so that the equation is

    D0 - dp - S0 + sp = 0

    I solve to get

    p = D0 - S0/ d - s,

    but the answer in the book is

    p = D0 - S0/ s + d,

    I am not able to understand how they got this answer.
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  2. #2
    MHF Contributor Also sprach Zarathustra's Avatar
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    Quote Originally Posted by nquadr View Post
    I have these two equations:

    D0 - dp
    S0 + sp
    Where you see the equations?
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  3. #3
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    first one is demand
    second one is supply
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  4. #4
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    e^(i*pi)'s Avatar
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    Solve D_0 - dp = S_0 + sp

    Isolate p on one side and factor it out. That equation will be valid when supply = demand
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