Word Problems Answers

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5

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 Salt13.5 0 Amount of Solution90 x

A
StartFraction 13.5 Over 90 minus x EndFraction = StartFraction 25 Over 100 EndFraction
Option A
B
StartFraction 13.5 Over x EndFraction = StartFraction 25 Over 100 EndFraction
Option B
C
13.5 (90 minus x) = 0.25
Option C
D
13.5 (90 minus x) = 25
Option D
9

Grant plans to evaporate enough water from 22 gallons of a 16% ammonia solution to make a 24% ammonia solution. Which equation can he use to find n, the number of gallons of water he should remove?

A
3.52 (22 minus n) = 0.24
Option A
B
StartFraction 22 minus n Over 3.52 EndFraction = StartFraction 24 Over 100 EndFraction
Option B
C
StartFraction 3.52 Over 22 minus n EndFraction = StartFraction 24 Over 100 EndFraction
Option C
D
3.52 + (22 minus n) = 0.24
Option D

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Word Problems Answers — FL-1200700-Mathematics…