A total of 85 red and blue sweaters were shipped to the store, among which the number of red sweaters was 13 more than twice the number of blue sweaters. How many blue sweaters did the store ship?
商店运来红、蓝毛衣一共85件，其中红毛衣的件数比蓝毛衣件数的2倍还多13件．商店运来蓝毛衣多少件？
<gadget id="calculator">85 - 13</gadget>
<output>72</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">72 / 3</gadget>
<output>24</output>

<result>24</result>