Two bags of biscuits and two bags of potato chips total 24.8 yuan, and it is known that each bag of potato chips is 3.8 yuan. How much is a bag of cookies? (column equation solution)
两袋饼干和两袋薯片共24.8元，已知每袋薯片3.8元．每袋饼干多少钱？(列方程解答)
<gadget id="calculator">2 * 3.8</gadget>
<output>7.6</output>

<gadget id="calculator">24.8 - 7.6</gadget>
<output>17.2</output>

<gadget id="calculator">17.2 / 2</gadget>
<output>8.6</output>

<result>8.6</result>