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20 February, 03:36

The pump price was x dollars per gallon of gasoline yesterday. The price increased by 10 cents per gallon today. If a driver pumps 12.4 gallons of gasoline today, how much does he have to pay?

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  1. 20 February, 05:40
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    The price of today would be $ (x+0,1) because 10 cents is $0,1. Therefore, he needs to pay 12.4 (x+0.1) = $ (12.4x+1.24) if he buys 12.4 gallons of gas today.

    Good luck!
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