Solve the equation.
As one alternative to gasoline-powered vehicles, flex fuel vehicles can use both regular gasoline and E85, a fuel containing 85% ethanol. The ethanol in E85 is derived from corn and other plants, a renewable resource, and burning E85 results in less pollution than gasoline. Because using E85 results in a lower fuel economy, its price per gallon must be lower than the price of gasoline in order to make it an economical fuel option. A 2007 Chevrolet Tahoe gets 21 mpg on the highway using gasoline and only 15 mpg on the highway using E85. If the price of gasoline is $3.36 a g

Question

Solve the equation. 
As one alternative to gasoline-powered vehicles, flex fuel vehicles can use both regular gasoline and E85, a fuel containing 85% ethanol. The ethanol in E85 is derived from corn and other plants, a renewable resource, and burning E85 results in less pollution than gasoline. Because using E85 results in a lower fuel economy, its price per gallon must be lower than the price of gasoline in order to make it an economical fuel option. A 2007 Chevrolet Tahoe gets 21 mpg on the highway using gasoline and only 15 mpg on the highway using E85. If the price of gasoline is $3.36 a g