# Acidity Concentration

Algebra Level 2

There is a solution A of $$\SI{150}{\milli\liter}$$ with 30% acidity. What should be the acidity concentration (in %) of solution B to be added to solution A so the resulting solution C will be $$\SI{1}{\liter}$$ and 50% acidity? Round the answer to the nearest percent.

Tip. Use the following table for your help:

 Solution A$$\hspace{10mm}$$ Solution B$$\hspace{10mm}$$ Solution C$$\hspace{10mm}$$ Volume$$\hspace{10mm}$$ $$\SI{150}{\milli\liter}$$ ? $$\SI{1}{\liter}$$ Acidity % 30% ? 50%
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