SOLUTION: How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 30 % ​antifreeze?

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Question 1144848: How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 30 % ​antifreeze?
Answer by ikleyn(52793) About Me  (Show Source):
You can put this solution on YOUR website!
.

Let x be the total volume, now unknown.  Then


    1%2Fx = 0.3


is the equation for the total volume.


From the equation,


    x = 1%2F0.3 = 10%2F3 gallons = 31%2F3 gallons.


Hence, you should add  31%2F3 - 1 = 21%2F3 gallons of water.   ANSWER