Mom bought two boxes of apples, weighing 24.6 kilograms in total. If 2.5 kilograms are taken out of the first box and put into the second box, the weight of the two boxes of apples is equal. How many kilograms of apples are there in the first box?
妈妈买了两箱苹果，共重24.6千克，如果从第一箱中取出2.5千克放入第二箱，这时两箱苹果质量相等．原来第一箱有苹果多少千克？
<gadget id="calculator">2.5 * 2</gadget>
<output>5</output>

<gadget id="calculator">24.6 + 5</gadget>
<output>29.6</output>

<gadget id="calculator">29.6 / 2</gadget>
<output>14.8</output>

<result>14.8</result>