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At the start of a trip, a car’s gas tank contains gallons of gasoline. During the trip, the car consumes 1⁄8 gallons of gasoline. How much gasoline is left in the tank? Please explain thoroughly.

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LazyBun
Answer: (7/8)x gallons

Explanation:

Let x be the amount of gasoline at the start of the trip.

During the trip the car uses 1/8 gallons of gasoline

Which mean it uses 1/8 of the original gasoline, (1/8)x.

Gasoline left in the tank:

x - (1/8)x = (7/8)x

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