SOLUTION: How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 25% antifreeze?

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Question 942744: How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 25% antifreeze?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 25% antifreeze?
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let x=amt of water should be added
100%*1=25%(1+x)
1=.25+.25x
.25x=.75
x=3
amt of water should be added=3 gal.