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A gas station sells regular Faldo line for $2.39 and premium for $2.79 per gallon. The total gas sold 550 for bot types of gasoline in one day for a total of 1,344.50 how many gallons of premium gasoline were sold?

Respuesta :

2.39x+2.79y=1344.50  where x is regular and y is premium
x+y=550

U will get x=475 y=75
75 gallon premium 

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