Math Help - Need help solving

1. 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?

2. Re: Need help solving

Originally Posted by scaliva21
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.

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