A shirt store of a certain brand sells 13 shirts in the morning and 17 of the same shirts in the afternoon. Knowing that the price of each shirt is the same, I bought 820 yuan more in the afternoon than in the morning. What is the price of each shirt? (solution with equation)
某种品牌衬衫专卖店，上午卖出13件衬衫，下午又卖出同样衬衫17件．已知每件衬衫的售价相同，下午比上午多买了820元．每件衬衫的售价是元？(用方程解答)
<gadget id="calculator">17 - 13</gadget>
<output>4</output>

<gadget id="calculator">820 / 4</gadget>
<output>205</output>

<result>205</result>