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# Algebra

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How many liters of pure water must be added to how many liters of a 25% bleach solution to make 12 liters of a 20% bleach solution?

Aug 20, 2021

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How many liters of pure water must be added to how many liters of a 25% bleach solution to make 12 liters of a 20% bleach solution?

Hello Guest!

Wie viele Liter reines Wasser müssen zu wie vielen Litern einer 25%igen Bleichlösung hinzugefügt werden, um 12 Liter einer 20%igen Bleichlösung herzustellen?

$$(12l-x)\cdot 0.25=12l\cdot 0.20\\ 12l\cdot0.25-0.25x=2.4l\ |\ +0.25x-2.4l\\ 3l-2.4l=0.25x\ |\ :0.25\\ \dfrac{0.6l}{0.25}=x$$

$$x=2.4l$$

2.4 liters of pure water must be added to 9.6 liters of a 25% bleach solution to make 12 liters of a 20% bleach solution.

!

Aug 20, 2021