Mathematics, 04.02.2020 00:48, Bvrz6198

Afarmer has 100 gallons of a solution that is 70% disinfectant. he wishes to mix it with a solution that is 90% disinfectant to make a 75% disinfectant solution. how much of the 90% disinfectant solution must he use?

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Afarmer has 100 gallons of a solution that is 70% disinfectant. he wishes to mix it with a solution...