Answer:
The answer to this question is x= 3.5. Gasoline costs $3.5.
Explanation:
X represents the cost of gasoline. For 12 gallons the price is $42.00.
12x= 42
Divide by 12 =
x = 3.5.
To double-check, plug that number in this equation:
9x= 31.50
9(3.5) = 31.50
31.50 = 31.50
Hope this helps!