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29 April, 15:43

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

+2
Answers (1)
  1. 29 April, 19:30
    0
    The answer has to be B
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