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Linear Equation

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A gas station sells regular gas for $2.20 per gallon and premium gas for $2.70 a gallon. At the end of a business day 220 gallons of gas were sold and receipts totaled $519. How many gallons of each type of gas were sold?

I know its a linear equation. just cant find out how to put it in equation form..

  • Linear Equation -

    Let x=number of gallons of regular sold
    then 220-x=number of gallons of premium sold
    Total receipt:

    Solve for x.

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