Question

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?

Answer 1

The answer to this is A

Answer 2

The equation can be used to find x, the number of gallons that should be evaporated is:
`(13.5)/(90-x)=(25)/(100)`.

Explanation:

Consider the provided information.

Let us consider x is the amount of water Carlon plans to evaporate.

Thus, 90 - x is the amount of water after being evaporated.

The amount of salt is 15% of 90 gallons which can be written as:

`S=90*{0.15}`

`S=13.5`

The percentage of salt will be:

`\%S=(13.5)/(90-x)=(25)/(100)`

Hence, the equation can be used to find x, the number of gallons that should be evaporated is:
`(13.5)/(90-x)=(25)/(100)`.