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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]

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New post 14 Oct 2006, 12:52
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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?



Answer was d = p-.18/1.04.

I tried plugging in numbers, and somehow could not come up with this. Would someone please help? Thanks.
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New post 14 Oct 2006, 13:08
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

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 [#permalink]

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New post 14 Oct 2006, 13:15
Thanks. Don't know what I was thinking, before... :oops:
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  [#permalink] 14 Oct 2006, 13:15
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Roughly: Gas stations compute price per gallon (p) by adding

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