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Mixture problem

How much pure water must be mixed with 8 pints of 70% developer to produce a mixture that is 13% developer?

Solution Preview

Suppose x pints of pure water are required.
Volume of developer in 70% of 8 pints = 0.7*8 = 5.6 pints.
Volume of pure ...

Solution Summary

This is a mixture problem regarding water and developer.