successstory wrote:

A gas station calculates price per gallon p, in dollars, charged at the pump by adding a 4% sales tax to the dealer's price per gallon d, in dollars. and then adding a gas tax of $0.18 per gallon. Which equation gives the dealer's price per gallon d in terms of the price per gallon p charged at the pump?

Answer: d = (p - 0.18) / 1.04

Solution?

From problem

p = 104 percent of d + .18

or, p = (104d/100) + .18

or. p = 1.04d + .18

or, p - .18 = 1.04d

or, d = (p - 0.18) / 1.04 --> answer

Hope this helps