A pen is 4.65 yuan, which is 3.85 yuan more expensive than a pencil. How much is a pencil? (List the equations involving the unknown x, and then solve them.)
一支钢笔4.65元，比一支铅笔贵3.85元，一支铅笔多少元？(列出含有未知数x的等式，再解答出来．)
<gadget id="calculator">4.65 - 3.85</gadget>
<output>0.8</output>

<result>0.8</result>