Carlon plans to evaporate a number of gallons of water from 90 gallons of a 15% salt solution to make a 25% salt solution. Which equation can he use to find x, the number of gallons that should be evaporated? Original (Gallons) Removed (Gallons) New (Gallons) Amount of Salt 13. 5 0 Amount of Solution 90 x StartFraction 13. 5 Over 90 minus x EndFraction = StartFraction 25 Over 100 EndFraction StartFraction 13. 5 Over x EndFraction = StartFraction 25 Over 100 EndFraction 13. 5 (90 minus x) = 0. 25 13. 5 (90 minus x) = 25.
