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Math Help - Need help solving

  1. #1
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    Need help solving

    I was given Q = 400-2p, and I need to solve for P. The answer I arrived at is P = Q + 200. Is that correct?
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    Junior Member PaulAdrienMauriceDirac's Avatar
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    Re: Need help solving

    Quote Originally Posted by scaliva21 View Post
    I was given Q = 400-2p, and I need to solve for P. The answer I arrived at is P = Q + 200. Is that correct?
    Hello scaliva21.
    Q=400-2p

    Since you want to solve for p, you have to isolate it, so you subtract 400 from both sides.

    Q-400=-2p

    and in order to continue isolation of p, you have to divide both sides by -2.

    \frac{Q-400}{-2}=p -> p=\frac{Q}{-2}+\frac{-400}{-2} -> p=200-\frac{Q}{2}
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