Type A has an alcohol concentration of 40%, and Type B has an alcohol concentration of 36%. They are mixed together to obtain 11 kilograms of an alcohol solution with a concentration of 38.5%. Among them, Type A alcohol is 3 kilograms more than Type B alcohol. How much alcohol is there in Type A? kilogram.
A种酒精浓度为40%，B种种酒精浓度为36%，它们混合在一起得到了11千克浓度为38.5%的酒精溶液，其中A种酒精比B种酒精多3千克，则A种酒精有多少千克．
<gadget id="calculator">11 + 3</gadget>
<output>14</output>

<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<result>7</result>