SOLUTION: How much water should be added to 1 gallon of pure acid to obtain a solution that is 55% acid?

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Question 908054: How much water should be added to 1 gallon of pure acid to obtain a solution that is 55% acid?
Found 2 solutions by richwmiller, Alan3354:
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
.55*(1+x)=1
.55+.55x=1
.55x=.45
x=45/55
x=9/11=.81818181818181818181818181818182
check
.55(1.81818181818181818181818181818182)=1
55/100*(1 9/11)=1
55/100*(20/11)=1

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Never add water to pure acid.
Add the acid to the water.