A candy company wants to produce 25 kilograms of a special 35% fat content chocolate to conform with customer dietary demands. To obtain this, a 50% fat content imported chocolate is combined with a 25% fat content domestic chocolate in a special melting process. How many kilograms of the 50% fat content chocolate and how many kilograms of the 25% fat content chocolate are used to make the required 25 kilograms?

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