Mathematics

Matthias Ritter

8 May, 10:56

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