SOLUTION: A solution contains 5% bleach. How much pure bleach must be added to 25 liters to make the solution 8% bleach?

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Question 335317: A solution contains 5% bleach. How much pure bleach must be added to 25 liters to make the solution 8% bleach?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let Z be the amount of 100% bleach added,
5%2825%29%2B100%28Z%29=8%2825%2BZ%29
125%2B100Z=200%2B8Z
92Z=75
Z=75%2F92liters