Xiaoxue has 300 stamps, and after giving Xiaoru 20, the two have the same number of stamps. How many stamps did Xiaoru originally have? (solution by equation)
小雪有邮票300张，给小如20张后两人的邮票张数一样多，小如原来有邮票多少张？(用方程解)
<gadget id="calculator">300 - 20 - 20</gadget>
<output>260</output>

<result>260</result>