Chemicals A and B combine in a 3-to-1 ratio to form a compound. The amount of compound being produced at any time is proportional to the unchanged amounts of A and B remaining in the solution. So, when 3 kilograms of A is mixed with 2 kilograms of B, you have

One kilogram of the compound is formed after 10 minutes. Find the amount formed after 20 minutes by solving the equation

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dx dt = 3x 3 - 3 ) (2 к 3 = 3К 12x + 32).