# Re-arrange

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• Feb 15th 2011, 11:51 AM
rome
Re-arrange
Re-arrange in terms of P:

$P = x + SPT / 100$

Thank you.
• Feb 15th 2011, 12:14 PM
Ackbeet
What are you solving for? P?
• Feb 15th 2011, 12:29 PM
rome
Quote:

Originally Posted by Ackbeet
What are you solving for? P?

Yes.
• Feb 15th 2011, 12:30 PM
Ackbeet
Ok, so what's the usual first step? Or what have you done so far?
• Feb 15th 2011, 12:35 PM
rome
$P - SPT/100 = x$

P.S. I don't need a worked solution- but I do need to re-arranged pretty quickly (it's not school work).
• Feb 15th 2011, 12:37 PM
Ackbeet
That's correct. What's next?
• Feb 15th 2011, 12:41 PM
rome
I don't know. That's why I'm here.
• Feb 15th 2011, 12:43 PM
Ackbeet
Quote:

Originally Posted by rome
I don't know. That's why I'm here.

That's fine. That's why we're here, as well: to help you get unstuck. Try factoring the P out. What do you get next?
• Feb 15th 2011, 12:46 PM
rome
Like this?

$P - P(ST/100) = x$
• Feb 15th 2011, 12:47 PM
Ackbeet
Well, that's certainly not incorrect, but can't you factor even more?
• Feb 15th 2011, 12:49 PM
rome
How do you mean? Surely P-P=0 ?
• Feb 15th 2011, 12:52 PM
Ackbeet
No, I was thinking more like this:

$P - P(ST/100) = x$

$P(1- ST/100) = x.$

That's because of the distributive law. Do you see how that's done?
• Feb 15th 2011, 12:53 PM
rome
Edit: posted this before I saw your post

Hold on, like this:

$P - PST(0.01) = x$

?
• Feb 15th 2011, 12:58 PM
rome
Quote:

Originally Posted by Ackbeet
No, I was thinking more like this:

$P - P(ST/100) = x$

$P(1- ST/100) = x.$

That's because of the distributive law. Do you see how that's done?

I think so. Thank you.
• Feb 15th 2011, 01:00 PM
Ackbeet
Can you finish? What condition do you think you'll need to mention as a caveat?
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