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26 October, 00:47

in september 2007, the average price of gasoline was $2.81 a gallon. This price represented an increase of $2.31 less than twice the price the previous year. Use the equation 2.81 = 2x - 2.31 to determine the price of gasoline in September 2006.

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  1. 26 October, 01:35
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    x = $2.56

    Step-by-step explanation:

    To solve this, you do the inverse of both operations, which is multiplication and subtraction. The first inverse would be addition, so 2.81 + 2.31 = 5.12. Then, the second inverse would be division, so 5.12 divided by 2 = 2.56. So therefore, x = $2.56 is the correct answer for the price in September 2006.
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