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r=2.24+0.06t p=2.89+0.10x In the equ...

`r=2.24+0.06t`
`p=2.89+0.10x`
In the equation above, r and p represent the price per gallons, in dollars, of regular and premium grades of gasolin, respectively, x months after January 1 of last year. What was the cost per gallon, in dollars, of premium gasoline for the month in which the per gallons price of premium exceeded the per gallon price of regular by $0.93?

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