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On a 3-week vacation to Paris, Martha's expenses for food, gifts, and accommodations was $80 less than three times her airfare. If the total expenses for

the trip was $2660, how much was her airfare?


Let airfare be x. Therefore other.expenses =3x-80 A/q,x+3x-80=2660.....,4x=2740...x=$685(ans)
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