SOLUTION: how much should be added to one gallon or pure antifreeze to make a solution that is 10% antifreeze?

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Question 260875: how much should be added to one gallon or pure antifreeze to make a solution that is 10% antifreeze?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
100%281%29%2B0B=10%281%2BB%29
100=10%281%2BB%29
B%2B1=10
B=9
9 gallons of water need to be added to dilute to 10%.