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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

Respuesta :

Answer:

An equation can be used to find x, the number of gallons that should be evaporated is:

13.5 / (90 - x) = 25/100

Step-by-step explanation:

The first thing we will do for this case is define variables.

 We have then:

 x = amount of water to evaporate.

 90-x = amount of water after being evaporated.

 The amount of salt is:

 S = 90 * 0.15 = 13.5

 The percentage of salt will be:

 % S = 13.5 / (90 - x) = 25/100

Answer:

the answer is A

Step-by-step explanation:

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