SOLUTION: How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 50% antifreeze?

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Question 267615: How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 50% antifreeze?
Answer by ankor@dixie-net.com(22740) 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 50% antifreeze?
:
1 gal of water, seems pretty obvious, but it you want an equation where x = amt of water
:
x = .5(x+1)
x = .5x + .5
x - .5x = .5
.5x = .5
x = 1 gal