Mom buys 4 adult tickets and 1 child ticket for the park. The total cost is 225 yuan, and each child ticket is 25 yuan. Find the selling price of each adult ticket. (column equation solution)
妈妈买4张公园的成人入场券和1张儿童入场券，共需225元，儿童入场券每张25元，求每张成人入场券的售价．(列方程解答)
<gadget id="calculator">225 - 25</gadget>
<output>200</output>

<gadget id="calculator">200 / 4</gadget>
<output>50</output>

<result>50</result>