Math Help Needed - Rewriting Formulas

I need to isolate the A.

Here's the equation:
D = P - FA

The answer is:
A = P - D
_____F

Here's what I did:
D = P - FA

D -P = -FA

D - P = A
_-F

I don't know if I did it wrong, or if I'm supposed to somehow switch the D and P, and make the F a positive. . . I'm confused.

Any help is greatly appreciate.
This probably seems like an odd topic :P
Thanks.

D = P - FA

D + FA = P - FA + FA

D + FA = P

D + FA - D = P - D

FA = P - D

FA / F = (P - D) / F

A = (P - D) / F


I think, haven't done those in a while...

Perfect, thank you very much!

Quote:

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Originally Posted by Raazesk

Perfect, thank you very much!

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Try and find a second opinion. It has been years...

lol I will. Thanks again.

Here's what I did:
D = P - FA

D -P = -FA

D - P = A
_-F
[/QUOTE]

Now multiply by -1/-1
Which is basically 1 so u get

(D-P/-F)*(-1/-1)=A*1


Equals

-D+P/F=A

Quote:

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Originally Posted by StompArtist

D = P - FA

D + FA = P - FA + FA

D + FA = P

D + FA - D = P - D

FA = P - D

FA / F = (P - D) / F

A = (P - D) / F


I think, haven't done those in a while...

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This is correct

O.O too much for freshman :( (me)