SOLUTION: A nurse has a 60% bleach solution that she needs to add some water to so that the new bleach solution is a safer 20% bleach solution. How much water does she need to add to 8 gallo

Question 1028680: A nurse has a 60% bleach solution that she needs to add some water to so that the new bleach solution is a safer 20% bleach solution. How much water does she need to add to 8 gallons of the 60% bleach solution to result in a 20% bleach solution?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
--------Bleach
-----------percent----------------Amount
Bleach 60 ---------------- 8 gallons
Water 0 ---------------- x gallons
Mixture 20 ---------------- 8 + x gallons

60 * 8 + 0 x = 20 ( 8 + x )
480 + 0 x = 160 + 20 x
0 x -20 x = -480 + 160
-20 x = -320
/ -20
x = 16 gallons Water

m.ananth@hotmail.ca

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