Maths-
General
Easy

Question

After an oil pipeline burst one morning, gas prices went up by $2.20 per gallon. If that afternoon you bought 10 gallons of gas for $53.90, what was the price per gallon before the oil pipeline burst that morning?

The correct answer is: $3.190


    • Hint:
    ○ Form the eqaution using given information.
    ○ Take variable value as any alphabet.
    ○ Take terms with cofficient at one side and without cofficients at another side.
    • Step-by-step explanation:
    ○ Given:
    Increase price per gallon = $2.20.
    No of gallons of gas brought = 10.
    Total money paid = $53.90.
    ○ Step 1:
    Let the original price of one gallon of gas be x.
    So,
    Price of 1 gallon of gas after burst = original price + increase in price
    Price of 1 gallon of gas after burst = x + 2.20
    ○ Step 2:
    ○ Total selling price.
    Price of 1 gallon of gas after burst = x + 2.20
    Price of 10 gallon of gas after burst = (x + 2.20) cross times 10
    rightwards double arrow10x + 22
    As it is given total money paid is $53.90
    ∴ 10x + 22 = 53.90
    rightwards double arrow10x = 53.90 - 22
    rightwards double arrow10x = 31.90
    rightwards double arrowx = fraction numerator 31.90 over denominator 10 end fraction
    rightwards double arrowx = 3.190
    • Final Answer:
    Hence, the original price of one gallon of gas is $3.190.

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