SOLUTION: Sal added3 gallons of gas to a tank,which made the tank half full. A full tank containef f gallons. How many gallons were in the tank originally

Question 965084: Sal added3 gallons of gas to a tank,which made the tank half full. A full tank containef f gallons. How many gallons were in the tank originally
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Half full is f/2.

Let u be the unknown number of gallons in tank at the beginning.

Solve for u.

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