SOLUTION: I have a finance stock account margin problem where algebra is needed. The equation that needs to be solved comes out as follows: {{{(100p-4000)/100p=.3}}} I have to solve for

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Question 26949: I have a finance stock account margin problem where algebra is needed. The equation that needs to be solved comes out as follows:
%28100p-4000%29%2F100p=.3
I have to solve for p, which is the price at which the maintenance margin call will have to be made by the broker. I have tried everything I can think of and can't solve this. Help would be much appreciated, thank you.
Answer by mbarugel(146) About Me  (Show Source):
You can put this solution on YOUR website!
First, multiply both sides by 100p, obtaining:
100p-4000+=+0.3%2A%28100p%29
Subtract 0.3%2A%28100p%29 from both sides and add 4000 to both sides:
100p+-+0.3%28100p%29+=+4000
Take 100p as common factor
100p%281-0.3%29+=+4000
100p0.7+=+4000
70p+=+4000
Finally, divide both sides by 70
p+=+4000%2F70+=+57.1428...