SOLUTION: How many gallons of water should be added to 30 gallons of a solution that is 70% antifreeze in order to obtain a mixture that is 60% antifreeze?
Algebra.Com
Question 285111: How many gallons of water should be added to 30 gallons of a solution that is 70% antifreeze in order to obtain a mixture that is 60% antifreeze?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
from the standpoint of antifreeze
.7*30=.60*(30+x)
2.10=1.80+.6x
.30=.6x
5=x
x= 5 gallons of water
from the standpoint of water
(.3*30)+x=(30+x)*.4
9+x=12.+.4x
.6x=3
multiply by 10
6x=30
x=5 gallons of water
RELATED QUESTIONS
How much water should be added to 30 gallons of a solution that is 70% antifreeze in... (answered by Earlsdon)
How much water should be added to 30 gallons of a solution that is 70% antifreeze in... (answered by ptaylor)
How much water should be added to 30 gallons of a solution that is 70% antifreeze to get... (answered by josmiceli)
How much water in gallons should be added to 1 gallon of pure antifreeze to obtain a... (answered by stanbon)
Initially, a tank contains 20 gallons of 30% antifreeze solution. How many gallons of an... (answered by ptaylor)
How many gallons of a 80% antifreeze solution must be mixed with 70 gallons of
30%... (answered by Edwin McCravy,greenestamps)
how many gallons of 70% antifreeze should be mixed with 10 gallons of 30% antifreeze to... (answered by mananth)
How many gallons of a solution that is 75% antifreeze must be mixed with 4 gallons of a... (answered by mpc12381)
how many gallons of a 70% antifreeze solution must be mixed with 100 gallons of 30%... (answered by Tatiana_Stebko)