SOLUTION: catron wants to make a cleaning solution that is 40% lysol. how many gallons of water must be added to 20 gallons of a solution that is 50% lysol to obtain the desired solution.??

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Question 625277: catron wants to make a cleaning solution that is 40% lysol. how many gallons of water must be added to 20 gallons of a solution that is 50% lysol to obtain the desired solution.???
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
catron wants to make a cleaning solution that is 40% lysol. how many gallons of water must be added to 20 gallons of a solution that is 50% lysol to obtain the desired solution.???
.
Let x = amount (gallons) of water added
then
.50(20) = .40(20+x)
10 = 8+.40x
2 = .40x
2/.40 = x
5 gallons = x