Use some thinking to answer the following question. You are filling up your car with gas. Your tank can hold 19 gallons. Your car started with x gallons in it. You paid $20 in gas. What was the cost of gas per gallon?\nOptions:\n(A) 19/20\n(B) x/20\n(C) (19-x) /20\n(D) x-19) /20\n(E) 19+20/x
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Amount of gas you added to your car: 19-x\nPrice per gallon: (19-x)/20 So the final answer is (C).
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