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# Roughly: Gas stations compute price per gallon (p) by adding

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Director
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Roughly: Gas stations compute price per gallon (p) by adding [#permalink]  14 Oct 2006, 11:52
Roughly: Gas stations compute price per gallon (p) by adding 4% sales tax to dealer's price (d), then adding gas tax of .18 per gallon. What is p in terms of d?

I tried plugging in numbers, and somehow could not come up with this. Would someone please help? Thanks.
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Manager
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Re: Powerprep question [#permalink]  14 Oct 2006, 12:08
d is dealer's price per gallon
sales tax = 4% of d = 0.04d

Therefore p = d + 0.04d + 0.18
p= 1.04d + 0.18
d = p-0.18 / 1.04
Director
Joined: 11 Sep 2006
Posts: 514
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Kudos [?]: 35 [0], given: 0

Thanks. Don't know what I was thinking, before...
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