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) 
10
10x + 22
As it is given total money paid is $53.90
∴ 10x + 22 = 53.90
10x = 53.90 - 22
10x = 31.90
x = 
x = 3.190
- Final Answer:
Hence, the original price of one gallon of gas is $3.190.
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